I like PlanetScale, but they already have precedent very recently for having a free-tier and then cancelling it for a minimum of $40/month plan, which made many people switch. What's to stop them from doing the same here?
Be wary of building a cheap hobby project on it expecting pricing to stay consistent. If $40+ isn't feasible for you, you may be trying to switch off to a hosted PostgreSQL option, with all the pain MySQL->Postgres entails, soon.
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