I was baffled when they went down. MongoDB and ArangoDB did well so there seems to be a valid case for new databases. Rethink was loved by HN commenters. I use

I was baffled when they went down. MongoDB and ArangoDB did well so there seems to be a valid case for new databases. Rethink was loved by HN commenters. I used it in a startup I was working at in 2015-2017 and it was a pleasure.