@chris Although having to manually update ACF, upgrade to pro, or switch to a "fork" will personally affect a heck of a lot of people (millions?).
Also every plugin dev now has to worry that their plugin may be next. At this rate, I think there won't be many left who can sit back and ignore the nonsense.
I think leaving/switching may be difficult to do for many people so it wouldn't surprise me if it takes a few months to really see the impact