If anyone at EFF is going to combine an encyclopedic knowledge of Dungeons & Dragons with an encyclopedic knowledge of copyright law, it's going to be the fabulous Kit Walsh:

https://www.eff.org/deeplinks/2023/01/beware-gifts-dragons-how-dds-open-gaming-license-may-have-become-trap-creators

Beware the Gifts of Dragons: How D&D’s Open Gaming License May Have Become a Trap for Creators

The company that owns Dungeons and Dragons (D&D) is planning to revoke the open license that has, since the year 2000, applied to a wide range of unofficial, commercial products that build on the mechanics of the game.

Electronic Frontier Foundation
@evacide This got me wondering about free gaming systems... I haven't played D&D for a long time, but I'd be inclined to try one of these instead. https://sgryphon.gamertheory.net/2022/06/04/open-source-alternatives-to-dungeons-dragons/
Open source alternatives to Dungeons & Dragons – Software / Wetware