In reply to Brian Coords.

I don't think they're being stubborn - many simply prefer the old editor. Instability of the block editor may be a big factor in that for some users, like you mentioned. I think it would be interesting to poll classic editor users to see what their reasons are. If you read the comments here regularly, though, you are almost guaranteed for someone to tell you every day why they are sticking with the classic editor. 😁