sigfried
Adventurer
It sounds like you are arguing that anyone who writes a contract and enters into an agreement with it can modify that contract in any way at any time. That a clause that specifies how the contract works can simply be removed at will as a default.So, it really comes down to this. "You can use any prior version of this License" is true until it isn't. They can revoke that, just like they can revoke the rest of the license, Q&A notwithstanding. The Q&A indicates the status quo, certainly, but is not binding forever. I always thought that the section saying you can use prior versions was only a clarification. I think WotC's answer here is a little disingenuous. It may be a statement of their current policy, but I don't think it is an accurate representation of their own legal rights.
Perhaps that is not what you are saying, but that's how it comes across.
I find that to be highly dubious. Such a principle would make the whole notion of a contract meaningless. The core understanding of a contract is that it binds two parties in a legal agreement based on the terms of the contract that both mutually agreed to.
This is a contract that has been in force and unchallenged for 25 years and during that time a specific understanding of its meaning has been in place. That what is shared as OGC remains free for all when using the license. To try to revoke those rights unilaterally, including agreements between other parties sharing copyrighted material with each-other, is both a violation of the language of the contract, what that language is clearly trying to convey, and the way it has been used in practice for decades.
This is not a one-sided contract where WOTC gives and everyone else takes. Both parties agree to give their OGC material over to any licensed user. Its terms specify consideration from both/all parties of the contract.