Btrfs doesn’t have encryption, so you need to do it with luks to an mdadm raid, and build btrfs on top of that. Luks on mdadm raid is known to be slow, and in general not a great idea.

Why involve mdadm? You can use one btrfs filesystem on a pair of luks volumes with btrfs’s “raid1” (or dup) profile. Both volumes can decrypt with the same key.

A standard called SystemReady exists. For the systems that actually follow its standards, you can have a single ARM OS installation image that you copy to a USB drive and can then boot through UEFI and run with no problems on an Ampere server, an NXP device, an Nvidia Jetson system, and more.

Unfortunately it’s a pretty new standard, only since 2020, and Qualcomm in particular is a major holdout who hasn’t been using it.

Just like x86, you still need the OS to have drivers for the particular device you’re installing on, but this standard at least lets you have a unified image, and many ARM vendors have been getting better about upstreaming open-source drivers in the Linux kernel.

To the contrary, I would expect the sample to skew more towards people who have a heavily customized X session and strong opinions about window managers while drastically underrepresenting average GNOME users who stick with the default Wayland session. Someone who likes their custom setup can still be waiting for a Wayland equivalent while casual Ubuntu users have been defaulted to Wayland on new non-nvidia installs since early 2021.

I tried to do this a while ago with a GNOME system, setting GDM to automatically log me in, but I ended up always getting prompted for my password from gnome-keyring shortly after logging in which seemed to defeat the point. If you use GNOME, you might want to look at ArchWiki’s gnome-keyring page which describes a couple solutions to this problem (under the PAM section) which should be applicable on any systemd distro.

There’s only one case I’ve found where Wi-Fi use seems acceptable in IoT: ESPHome. It’s open-source firmware for microcontrollers that makes DIY IoT sensors and controls accessible over LAN without phoning home to whatever remote server, without trying to make anything accessible over the Internet, and without breaking in any way if the device has no route to the Internet.

I still wouldn’t call Wi-Fi use ideal even there; mesh can help in larger homes and Z-Wave/Zigbee radios tend to be more power efficient, though ESP32 isn’t exactly suited for a battery-powered device that’s expected to run 24/7 regardless.

I have configured custom Android kernel builds to enable more USB drivers, enable module support, and tweak various other things. For one tangible example of the result: I could plug in a USB Wi-Fi adapter and use it to simultaneously connect to another Wi-Fi network with the internal NIC while also sharing my own AP over USB. On an Android device of all things. I have also adjusted kernel builds for SBCs (like Pi clones) to get things working at all.

I have never seen any reason to configure a custom kernel for my own desktop/laptop systems. Default builds for the distros I’ve used have been fine for me; if I’m ever dissatisfied with anything it’s the version number rather than the defconfig. The RHEL/Rocky kernel omits a few features I want (like btrfs) but I’d rather stick to other distros on personal systems than tweak a distro that isn’t even meant for tweaking.

I recommend giving dnf the -C flag to most operations, particularly those that don’t involve downloading packages. The default behavior is often similar to pacman’s -y flag and so the metadata sync ends up slowing everything down by orders of magnitude.

I’ve long known about it. I don’t seriously use it, but I would if only my Wi-Fi router was fully supported. It’s an Asus one (that I got for free from T-Mobile a decade ago) so I installed Asuswrt-Merlin on it instead.

Following the recommendation of homelab communities, I got into OpnSense (a BSD-based firewall system for x86 hardware only) last year, still keeping my Wi-Fi router as a dedicated AP. In hindsight I somewhat regret that choice and probably would’ve been better off buying a new OpenWRT-compatible router and using it to handle firewall/routing/AP all in one device instead of wasting the power draw of another separate N100 system. I like having wireguard and vnstat in my router now, which Merlin didn’t offer, but I know OpenWRT has those too and I don’t have any other needs that warrant a higher-power router.

I’ve been using it since it felt usable enough in GNOME to me. Around 2015-ish, give or take a year. GNOME leading on Wayland support is a big part of why I switched to it from Xfce back then. Nowadays KDE and others have plenty good Wayland support too (better in some ways like allowing server-side decorations and global shortcuts) but I just haven’t felt like trying to properly experiment to see what I like.

I’ve always avoided Nvidia on my desktops. Stuck with either radeon or intel and never had any exceptionally big issues with them on Wayland. Though other things like hardware accelerated video decoding have had a history of being spotty on some drivers/GPUs.