There was that odd moment where he was competing for subs with T-Series, the Bollywood music company, but when he realized he wouldn't be number 1 on YouTube forever, he just stopped giving a shit.
tl;dr: I don't think you and I have the same meaning associated with the word 'retired'.
I'm sure that many of the things you see as "work" are hired out. Video editing, thumbnails, etc. Even hiring multiple Linux developers to help him get through a tricky spot in the build would be reasonable for someone "retired" but with a lot of money.
That's a completely normal evolution for any succesful influencer. In what world is that retirement? The only thing I can see being retired is his old online persona, the new persona seems more mature, likely tailored to please his fanbase who presumably have grown out of their teenage instincts (and have more money to spend now).