Personally I've started migrating to vanilla-extract (https://vanilla-extract.style/): syntactically & conceptually similar to SC, relatively easy migration and lots of the same advantages, but entirely precompiled with zero runtime and nicely framework & tooling agnostic.

Hi, I made the forks linked to here :D

We're also migrating to vanilla-extract, huge fan of the runtime type-safety ;) The SC forks is to buy us time, Rome wasn't built in a day :)