Back in 2010, 2011, I was looking to get into comics. Then I saw New52 about completely wrecked everything that I had known about the DC universe, and much of it was off-putting.
Fastforward 5 or so years, I find out about Rebirth, and how it was bringing back a lot of the previous continuity. I checked in, and liked what I saw. Especially the Super Family, and I'm looking forward to the BatCat wedding.
Now DiDio, or whomever, wants to wreck it all again?
If this happens, I'm out. And it sure looks like I wouldn't be the only one. If DiDio is adamant on wanting his history and legacy erasing reboot, just do it in another universe. There's 53 (thank you, Chimp Earth) already out there, with plenty of ways to introduce more.