I just need to drop my view cents here. I already wrote a comment:
Ah yep I can confirm that you close rooms in that case, unfortunately you suggest that it would be possible to reopen chats. However you didn't give a final statement for more then 6 month, that you will leave the room closed. That is how you lost my trust in community management. It is valid and correct to close rooms for good reasons, but don't imply that there are chances to change that if you already decided to leave a room closed.
I really want to give some more background for my comment. I was one of the room owners of “Android Era with Kotlin and Java”. In that room happened some shit which is not excusable. The majority of the room owners where informed that the room will be closed some minutes before the room was closed. It was implied that the room will be closed and if we would add some good reasons the room may be opened again. We never got a final answer; now it does not matter at all. In the end I am sure that the room was closed by missing moderation tools.
I'm sure that the room had been saved for good if there would be tools to enforce "room rules". Like no gifs, per room configurable ban of users which where simply not welcome in a specific room. A more intuitive explanation of the timeout feature. A official bot API would be nice for many reasons (e.g. for fun or documentation lookup).
In the end chats can be a good thing with the right people or can go to the dogs with the wrong users.