LAGS, so apparently unity announced that the fee will only be applicable to the next LTS version of unity so its safe to say that the future titles you teased, the games you've published/released are away from harm's way, this also means you wont be necessarily be learning C++ or what programming language you are planning on learn inorder to change studios tho its optional if you want to learn them just incase unity goes haywire again.
Yeah, they sent email to all users on few hours later it was announced. With how the backlash was from big devs they had to do it or else everyone would have switch to another engine. With their decision to walkback, I'm considering staying on Unity because I want to make those titles as I have envision.