I doubt that third-party companies will forget about this anytime soon, and while a lot of them are small outfits, a few of them have not-insignificant reach in terms of making themselves heard by at least a portion of the fan-base.
What I can't figure out is the timing in all of this. If 1D&D, and presumably a 1D&D SRD, isn't coming out for eighteen months, why try and revoke the OGL v1.0a next week? If WotC wants people to sign on to the OGL v1.1, what are they supposed to produce under it between now and mid-2024?