Btw, also for me the forum is very slow and I have a good internet connection and using a one year old Mac.

I completly agree. Also for me the developer forum is a ghost town. I hope that with the new UX improvements in the forum some Apple engineers find there way here and contribute. The only way to create a vibrant developer community is when at least 5-10 Apple engineers reply to multiple posts on a daily basis. Then also other developers will get attracted and use this forum more often. Let‘s cross fingers that the enthusiasm that was put into the forum recently is continuing the next weeks and months and that other Apple engineers start to use the forum more frequently. But I guess most of them don’t have free time to answer questions here.

If you want to delete a post for some other reason then… well… what’s the reason? In my case, for example, I wanted to add additional information to my question and accidentally created an answer to my question with that info. Then I realised that it would be much better if I would have clicked edit and extended my question, and then I did it. But there was no way to delete my answer with the same information as in the question.

It seems that this behavior is just related to certain questions, not to all. E.g. this one is not on my watch list: https://developer.apple.com/forums/thread/679098

I‘m also affected by this bug on a Mac mini i7, 2020 with 16 GB RAM. The worst thing is the slow down in UITests because I receive so many timeouts and as a consequence the tests are not reliable anymore with Xcode 12.5 on BigSur. I switched back to Catalina, but now I can not archive my project anymore because some external swift packages are build with 12.5. Apple, please fix it soon!