I decided to look at the wiki pages for some of the recently-added classic episodes, is it just me or are more segments cut from this batch of classics compared to what's already been on the service?
In particular, a lot of segments from the season 19 premier are cut, though some of them I am not really surprised about. But I saw that HBO Max replaced Chariots of Fur with the alternate 1992 version. After seeing that alteration was made, I checked and saw that it's completely cut from the HBO max version of episode 1836 (at least it's on DVD and the YouTube upload remains). I guess they decided they did not want to include Alistair Cookie's pipe on HBO Max (did they do the same with The Sound of Music on the HBO Max release of the season 20 finale, or with Gone with the Wind in the Grouch Appreciation Day episode?).
EDIT TO ADD: Okay I checked, Gone with the Wind was cut from that episode, the wiki doesn't note The Sound of Music being cut or replaced.