Someone posted a twitch conversation yesterday about this, I poked around on the page realised there was no open source version and noped out immediately.

I'm sure it's a great product (it seems like planetscale do good engineering and the folks I know who use them seem fine with it) but I don't do vendor lock-in as a service personally, I'll use whatever employer uses because that's the deal but for personal stuff, well this isn't designed for that really, wrong order of magnitude on scaling.