I think this is interesting to software people because the OGL is clearly inspired by open source licenses, being mostly a permissive license but also borrowing

I think this is interesting to software people because the OGL is clearly inspired by open source licenses, being mostly a permissive license but also borrowing the "or later" clause from GPL, which is herein being abused to try intimidate older license version users and secure additionally rights for Wizards themselves. I suspect it won't succeed if it ever does end up in a courtroom, but it does raise some interesting questions about where the line is. e.g. GFDL 1.3's Wikipedia can convert from GFDL to Creative Commons clause is arguably a similar claim to the idea that Wizards can now use OGL 1.0 content royalty free on the surface.