Or are we saying that they no longer support running minio on POSIX systems at all, due to using linux specific syscalls or something else I'm not thinking of? I don't know whether they did this or not.
Those seem like two very different things to me, and when someone says "they don't support POSIX", I assume the latter
I don'T think they would abandon POSIX systems in general, because what sense would that make?
I was in a car accident once, many years ago... nothing terrible but I was in shock (it was my first car accident) and in mild pain (bruises from the airbag and a headacke mostly). The other party came over and asked me if I had a phone. I was still in my car, trying to realize what happened. When I said that yes, I have a phone he said "then better call the police. the accident was your fault" (which for all I know was probably true), then he left to sit on the roadside and smoke a cigarette and scroll on his smartphone until the police and ambulance arrived, 15 minutes later. Because of him, they came with 4 or 5 extra vehicles, simply because I couldn't really answer their questions well ("how many people are in the other car? is anyone injuered besides you? are the cars still driveable or do they need to be towed?" all quesions I couldn't answer)
I overheard that he got a lecture from one of the cops later on, but still it was an experience that I don't want to make again anytime soon