As a DM, once initiative is rolled, I do not keep track of player AC, or any number on their sheet for that matter. I have a vague idea of their hit points, but I have a lot more going on on this side of the screen. Remembering if the fighter is holding their shield, or if someone has some special modifier applied to them is taking up unnecessary bandwidth. So I can take a guess that 29 hits your AC, but I always want to make sure.
As a DM, once initiative is rolled, I do not keep track of player AC, or any number on their sheet for that matter. I have a vague idea of their hit points, but I have a lot more going on on this side of the screen. Remembering if the fighter is holding their shield, or if someone has some special modifier applied to them is taking up unnecessary bandwidth. So I can take a guess that 29 hits your AC, but I always want to make sure.