Re: I watched the video. He's basically describing Linux.
"GNU made substantial improvements over 40+ year old Unix, which was full of arbitrary size limitations and crashes "
Arbitrary size limits. Do you mean ulimit? Unix was designed to be used as a multiuser system. System managers might need to use it to ration limited resources. Maybe you don't remember when 1.6Gb was a big, BIG disk. It's still in Linux but there's a reason you've never seen it used. Do you mean the default 10 process limit? I remember seeing that once in 1986. Generally the stuff that was there to make it possible to run Edition 7 or the like on 3/4 Mb memory ad tiny disks faded away.
Crashes? Application core dumps - of course. That's down to the application developer. Kernel panics, not so much. The one really crashy system I remember back in 1999 was down to a dodgy memory module*. I drove a lot of Unix variants back in the day. After SCO decided** to divert their efforts into litigation instead of development Linux was the alternative to running a Unix-like environment of PC H/W. I'm sorry to say that with gimmicks like systemd GNU are working to enshittify it.
* A bit traumatic. I was installing S/W on a cliant's client's system in Italy. The client's client didn't want be to leave until we had a clear run and I was due to fly back. I think it likely that the extra S/W was pushing up the memory requirement ant it was the first time the dodgy module had come into play. Fortunately it ran once & I managed to get away. The client had to sort out the H/W later.
** I often wonder how far they were being deliberately led on by Microsoft. SCO had been a great server OS for SMBs. If it wasn't deliberate it was extremely serendipitous to accidentally get SCO to take their eye off the ball while MS moved into the server market.