Sure. Some people might. But just like we had people scream "I'm done!" 14 years ago when they felt WotC insulted them with the "skip past the boring town guard to get to the fun fight beyond him" bit at the beginnings of 4E's advertising only for them to return to D&D with 5E later on... people can and will say anything they want because they know they are not beholden to any of it. They can just decide at some later point "Well, that was then, this is now" and do whatever they please.Obviously, everyone is free to make their own decisions but if WotC backtracks that doesn't mean that everyone who screamed "I'm done!" has to backtrack. Some people might decide that even though WotC changed their mind that they don't want to support a company who is obviously willing to consider these kinds of changes.
I haven't played D&D in over a decade, and it wasn't because I didn't want to play D&D anymore. I still wanted to play D&D but I just moved to Pathfinder and then Castles and Crusades. Whether or not the OGL changes the majority of people are likely going to still play D&D over other games for some time to come.
I just figure it's easier to save my time and energy by not saying anything now and thus not needing to retract it later on.