What does that mean that checkbox "Only change AddOns with API tag" ?

if it's unchecked it's gonna change all addons no matter what? even if they are not ready for the new API? I don't agree to this, sorry.

If this becomes a "thing" like you want it to, at some point there will be people thinking that using this will make their addons work with the new updates even if it's not the case. And they're gonna complain on our pages if they got UI errors.

And I intend to update mine only after checking that they are working on the new version on Live. Not before, and certainly not before AND after the patch: before for users who use this AND after those who don't use this. That's twice as much traffic, it doesn't make it smoother.