I disliked 125 Cards View enough that I downloaded a fresh copy of 115.10.1 and overwrote the Thunderbird folder's files. Then, of course, when I restarted TBird, I got a pop-up that said this older version couldn't run with the new profile 125 had made in Users ... Thunderbird\Profiles. Fortunately, I back up my Profiles folder every night before shutdown (with MR), so all I had to do was close TBird, delete the profile version 125 had made, mount my backup from last night, and copy the profile version into the current Profiles folder. Quick, easy, and painless.
Then I went to Bugzilla and complained, but my hopes are not high for getting any action.