Mid-show ads is more than enough to cancel Prime. Mid-video ads on youtube made me all but stop watching it on mobile. But I'll probably wade my way through S4 of The Boys and S2 of Invincible before doing so since they're both coming up in the near future. But this 100% explains the 2/4 premiere date for the last of Invincible episodes.
Same day and overnight delivery are something I never needed or wanted. 2-day delivery was nice, but now it's random. Amazon prices are no longer all but guaranteed to be competitive and buying directly from the manufacturer is often the same or lower price. Prime(sic) goeth before the fall I guess.