How to deal with new `rejectInvalidOptions` after v7 release?

[WikiRik]

After releasing v7 we'll still be working on future migration of methods to TypeScript which will likely also include more usages of rejectInvalidOptions to not silently ignore options anymore. Do we see that as a breaking change or a change that requires a minor release? Because it will likely break some projects, but the further functionality is not changed if they remove the invalid option (unless they're using different dialects in different environments).

Personally I see it as a breaking change but I think we can make it opt-in with a global option for v7 so don't have to postpone releasing those on a stable version.

What are your thoughts?

cc @sdepold @ephys @lohart13

[ephys]

IMO it depends on the method but globally I think we're going to need to stop the breaking changes in v7, and start implementing the rewrites as separate functions prefixed with _UNSTABLE_ that we will enable in v8