AMD has unfortunately a long history of abandoning products before its reasonable on its graphics division. Its not really acceptable, up until earlier this year my NAS/server was running a 3600 and its only for power saving purposes I changed that as its still a very workable CPU in that role.
It really depends on the project. Some of them take breaking changes seriously and don’t do them and auto migrate and others will throw them out on “minor” number releases and there might be a lot of breaking changes but you only run into one that impacts you occasionally. I typically don’t want containers that are going to be a lot of work to keep up to date so I jettison projects that have unreliable releases for whatever reason and if they put out a breaking change its a good time to re evaluate whether I want that container at all and look at alternatives.
So no its not safe, but depending on the project it actually can be.
Linux was in use on some university machines although I lot of them were still running Sun hardware OS. The main distribution I used at the time was Slackware.
Universities have been running Linux since the very early versions. Slackware was pretty common back in the 90s and 2000s and universities had labs full of them not least because there weren’t really laptops so they had to have enough machines for all the students. Universities have been heavily involved in the development of unix from its inception and a lot of the tools were initially written by university professors.