Programming and reading.
This would likely only hurt the end user. Many use chromium-based browsers, so you’re just driving those away.
You can detect Firefox, so you can do a superficial block in JS, but lemmy is such a simple site that you’d find it hard to find areas where there’s actual differences between the browsers, those usually only come from complex pages like video calling
Immutable distros aren’t immutable in the home folder though, they would be unusable otherwise, so that doesn’t solve OPs problem of dotfiles/personal files (I know nixOS tries to get rid of dotfiles, but in my experience that almost never works, it’s only helpful for replacing config files in /etc)
You can start steam just fine without the packages. In fact, if you install without them, it’ll ask you to install them every time, but you can skip that and it’ll work, just 32bit games won’t launch
Edit: Looks like I’m partially wrong, as pointed out by a commenter below, steam currently only launches the 32-bit version of the client, despite support for a 5l64-bit client
Does “Database > Merge from Database” not work for your case? I remember it helping when I had a similar situation
555 is still in beta, so I wouldn’t be surprised if something doesn’t work. That said, I haven’t experienced what you have (on GTX 1070 TI), though using 555 causes lots of kernel errors for me. Checking dmeg might reveal something in your case as well.
Usually we don’t distinguish between many2one and one2many, since it’s the same just viewed from the other entity.
There is one more class though, which is one2one. That is, the entities have a direct relationship. Sometimes this also includes the case where you have zero or one, i.e. the relation is optional on one side. This can be accomplished with an FK plus unique constraint or by merging the tables.
The main reason for Ubuntu against Debian is the packages. For Ubuntu, they’re much newer, and with PPAs (launchpad.net), you can often get more and/or newer packages built by other users. For debian, good luck, you’re stuck with old packages (which is the intent of Debian stable, but not nice as a user, that’s for server)