An aside, but as a non-native speaker and haven't heard of Bun before, an all-capitalized title is very confusing. "Who is Will Bun"?
People choose the "fastest" language or framework, then add a bunch of lazy ORM queries without really knowing how to properly leverage a performant database, stitch together a bunch of "microservices", adding multiple HTTP trips across the wire, and by that time the performance of the core language is a rounding error.
Also, having a slower runtime only marginally push people to code more efficiently (e.g. people wanting to use an ORM will do so either way)
Of course,if you're doing microservices correctly, it should be easy to separate the parts where performance is important and write them in a language optimized for that.
An "?" at the end would have helped a lot though.