Sounds fantastic @julieqiu and it's really awesome how much the feedback is being taken into account on this.
A suggestion I have on the redirect is to do it a little like Go Modules: first opt-in, then opt-out, then full switchover. Right now you have the ability to opt-in to always redirect using a cookie, so for the next stage you could redirect unless a specific cookie is set.
I think this would be a very gentle way of going about it, and might spark a final round of useful feedback as the whole community adapts to the change (while still being able to browse the legacy version).
If the percentage of traffic opting-in to the redirect is very high, this suggestion may be unnecessary, but I wanted to throw it out there.