Maybe I am being obtuse - but I really don’t see what it is you think you’ve had taken from you.

The conversation, the exchange of information, is intangible and transient by its very nature. You don’t own the conversation. There’s nothing about it to own.

If you think there’s some obligation on the part of the moderator to preserve the transcripts of conversations that you’ve taken part in, even against their own better judgement, then I’m sorry but I don’t see it.

But anyway, like I said - if you set up your own instance, you can keep those threads open for as long as you like.