It was an interesting rant. The guy is on point about the complexity issues. That’s been going on for a while now. SystemD is still a cluster, and more complexity is being added in to satisfy corporate interests.
I’m still not particularly worried about it. If all development on Linux stopped tomorrow, my desktop would still keep me going for about the next ten years.
He complained about increasing complexity and also lack of maintainability. If something is going to evolve and move forward, it will get more complex. That is the nature of evolution.
Also, by definition, you cannot have stable maintainability if a project is evolving and getting more complex. It seems like he wants everything to just be perfect all the time.