Details in Gizmodo. Lots and lots of details (via elekk.xyz). In other words, screw everyone who kept D&D alive in the public consciousness for decades, while the license owners squabbled and almost killed it several times out of pure greed.

As I said on Mastodon, the only silver linings to this news are:

1. It might not be so easy for Hasbro to sue everyone else into compliance as they seem to think, for a lot of little legal reasons.
2. It will give people an incentive to let D&D go the way of Harry Potter, and deservedly so.

But in the mean time, it's a mess, and will impact a lot of creators, including right here. That's why we can't have nice things.

They appear to have 'rolled it back' somewhat. However, the TTRPG community has started creating exit strategies. Some independent commercial publishers have used the situation to promote their derivatives. Personally, I'm not wowed with Pathfinder. It's has a history of being more available to the public, but their model is still a bit inflexible as to what a TTRPG can be.

Source: https://blizzardwatch.com/2023/02/02/dnd-ogl-1-1-controversy/

TANGENT: There are lots of interesting suggestions for new RPGs here on itch. I'm of the opinion that the best methodology is some sort of mix-and-match standard that can use as much or as little of any one component with any other. (I think this could be done with in-game-world documentation that explain the rules of the world in subtle ways. You compile your intended RPG system by choosing which bits of documentation you use to represent your game world.)

Pah. Rules is one thing. The important bit would be story. And as I found out, it is even questionable, how much of their rules they could copyright/make licenseable and furthermore, it is out for so long and with that ogl that it might even be considered public domain. But they seem to have paddled back exactly to that.

It was not a dumb move to have that ogl in the first place. The rules are rather  badly designed. It might invoke nostalgia, but there are better rulesets out there, incorporating decades of experience. But they managed what early windows did.  Flood the market.