Other stuff like the game Shovel Knight and even an open source frame limiting library broke because of this change, there are probably more things but this has not reached the masses yet.
I dont think the change was inherently bad but just ham fisting it into the release without widely announcing that the ABI will change is a massive failure on the glibc teams end.
No idea, but is that a problem for the 1Password people to fix? Google could change Chrome so it doesn’t support plugins whatsoever. Whose responsibility is that?