With the CRC impl change, do we want a different gamedata key so we don't break old versions? Or just avoid using it for a few years?

Since this was undocumented ever since, we could just say it's a "new" feature. You're required to update to a newer SourceMod build to use it. It's partially broken due to the hardcoded server.so path on older versions anyway and nobody complained, which seems to be a good indicator, that this isn't used anywhere.

I guess as long as we're always restricting the "old" gamedata rather than the "new" gamedata that does work!

I guess as long as we're always restricting the "old" gamedata rather than the "new" gamedata that does work!

I think that's the only way we'd plan to use it. That way it's less critical to go back and edit later.