Ability to downgrade to previous firmware

It would be great to be able to downgrade to previous firmware versions. As with any system, new firmware introduces new features but also new bugs that in some cases may make the whole thing unusable. In my case, 3.3.3 was perfect for my needs, but since 3.3.4 I’ve been having issues (which I reported) and 3.3.5 didn’t solve them. Customer experience has been bad and I don’t think that waiting months hoping that the next firmware will solve them is the right way. We should be able to go back to a known stable firmware version.