I have started interviewing people to learn more about how they shut down scientific research projects and/or software projects (both open source and commercial). If you have done this, either deliberately (on your own timeline) or abruptly (looking at you, DOGE) and are willing to talk about your experience, please reach out: I'm gvwilson@third-bit.com.

@gvwilson I know about the very recent shutdown of Retrospring (a Q&A website), afaik bc it got too big to maintain.

The developer and admin of that site made some blog posts about it that went unpublished (except: https://blog.retrospring.net/retrospring-is-shutting-down-on-1st-march-2025), but maybe @pixel can give some insights, if he's interested to talk about the process. I'm sure he's already working on his post-mortem either way.