Seems not really or only partially anyway; I cannot see, with disasters like Fauna, that anyone would trust their core stuff with something not open source. But maybe it's just me. I need to be able to switch and sure, I can switch to the open source fork libSQL (open core I think, so nope) (which they are rewriting to Rust for some bizarre reason; sqlite is one of the most readable, robust and well tested codebases in the business so it looks like burning vc money, but whatever), but once my business depends on their offline / replication / etc, then I cannot switch to anything, so never going to happen.
Again, opinion. It's core infra, in my opinion at least that should never depend on others or, if the others inevitably screw you over for a few $, you need to be able to move without possibly bankrupting your company.