I'm wary of stuff like this, probably really useful to rapidly iterate.... but what a maintence nightmare after 10 years and your schema has evolved 100 times, but you have existing customers in various state of completeness. I avoided firebase when it came out for this reason. I had a few bad experiences with maintaining applications built on top of Mongo that made it to production. It was a nightmare.
This is why I’ve always stayed well behind the bleeding edge but still within earshot if anything comes along that sounds like it’s of interest to me. I usually code to work and not for pleasure, although I do a little web programming for friends, but I still use jQuery and Typescript for that, I think the only “new”thing I use is tailwind, which is a bit of a game changer for what I like to do, I never liked CSS but it worked well enough for my needs.