That category is typically not available until the forum system decides that somebody has sufficiently participated in the community. We set it up this way because we had too many people suggesting features that were already implemented but users hadn’t spent enough time to discover existing mechanisms.
We have manually upped your trust level so you should be able to see that category now.
That said, your suggestion is both interesting and vaguely of concern, requiring some serious thinking. Reverting an entire rackspace to a previous version essentially requires recreating the entire rackspace and there are several technical reasons as well as usability reasons why doing that on the fly is potentially very dangerous.
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