I know its been a few years now, but it wasn't just about them attempting to revoke the OGL, they also specifically stated that they also owned everything ever published under the OGL, literally everything published for the past 20 YEARS was now their IP under the terms of the new OGL (if you bothered to read it).
They also tried to force the bigger names & content creators to sign it behind closed doors before the public could see the new OGL license. But nobody seems to remember this...
They not only sucker-punched the entire third-party publishing industry, the went full scorched-earth on everyone. There is no return from that.
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How do I personally remember? Well, I was right in the middle of putting the finishing touches on my OGL-based ttrpg at the time, working all night until 5am writing, editing, making art (I am a traditional artist. with 25+ years of experience), editing art, hiring other artists, editing their art to fit the layout, and so on every day for years.
The announcement of the revoking of the OGL brought all of that crashing down. Like many others, I opted to branch away from 5e after that & design my own games. Haven't bought a single dnd book since then.
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And all that aside... You know what I think they really lost? They lost a not-insignificant amount of the previous generation of gamers, and in the process they essentially burned the very people that cared about their game enough to play it in the LGS, to teach the next generation of gamers about why they love games and what games they want to create a lasting legacy for.
They showed us that legacy of 20 years of goodwill (and trust) meant nothing. We were the collateral damage they decided was acceptable when they moved forward with the OGL-disaster. They should be thinking about that in the years to come (but we already know that memories are short in the corporate world).