Earlier quoted context omitted.
Back when I used a debian based distribution I made use of https://bedrocklinux.org/ to make use of the AUR. It's not for everyone though.
Wow, that is super clever and really cool! I can't imagine there not being some sort of Arch/Gentoo/LFS style Random Tech Trouble with that much custom craziness, but it does look kind of fun
But when I turned my Linux Mint installation into Bedrock Linux I encountered no weird things. Eventually I starting booting into Arch instead of Linux Mint, but I can still boot Linux Mint if I want and I have access to all of its applications.
It helps that the developer is very active, and often online on IRC for a chat.
One functionality I still hope to see is the ability to use desktop environments across strata. Maybe in the next release.
[1]: https://bedrocklinux.org/0.7/feature-compatibility.html