What about Lua/Luajit?
In most scripting languages you have the interpreter binary and the (standard) libraries as separate files. But creating self-extracting executables, that clean up after themselves can easily be done by wrapping them in a shell script.
IMO, if low dependencies and small size is really important, you could also just write your script in a low level compiled language (C, Rust, Zig, …), link it statically (e.g. with musl) and execute that.
So generally the pro of coreboot is that it is open source, but the con is that it is open source.
What I mean by that, you can fix any issues yourself, however, if you are unable to do it yourself, you have to wait until someone does it for you and often what features are available and stable are a hit and miss.
Compared to proprietary bioses, the company has some kind of standardized process for developing the bios. So you often get want you would expect. However, if the money flow from the pc vendor to the bios vendor drys up, you, or the community of owners. will not be able to fix any issues.
Linux support should be the same, regardless if you choose proprietary or open source bios. But that depends on how well the coreboot was ported to the platform. So officially supported coreboot bioses are likely better than others.
Personally, if all other attributes are equal, would go with coreboot, because I like to support vendors that offer that choice, and IMO a open source solution, that you can review and build yourself is intrinsically more secure than a binary blob, where you have to blindly trust some corporation. But other security minded people might disagree, which is fine.
Check if you find anything about this in the kernel log (dmesg).
Not the drama itself should influence your judgment, but how they will deal with it.
Whenever people work together on something, there will be some drama, but if they are dealing with it, then that should be fine.
Nix and NixOS are big enough, that even if it fails, there are enough other people that will continue it, maybe under a different name.
Even it that causes a hard fork, which I currently think is unlikely, there are may examples where that worked and resolved itself over time, without too much of burden on the users, meaning there are clear migration processes available: owncloud/nextcloud, Gogs/Gitea/Forgejo, redis/valkey, …
So similar to kakoune? I tried that for a while, but it was missing some features so I went back to vim/neovim.
I need to know vi anyway, because that is available everywhere (as part of busybox), so using vim/nvim for bigger systems just fits.