>>160440
Not OP obviously but I've been using Mint for like 4 years. I haven't *had* to use the terminal to my memory, but I have used it. Yes it supports flatpak and appimages. I've been able to do everything I need to do with the software I can get. I don't know what you mean by "custom software" but I think I've installed dependencies in terminal before.

>>160442
No it doesn't.