That's a pre-optimization. React Native Web has been very performant for all my real world use cases.

I'd rather a small perf hit than have another code base for web. You get web for basically free when making a RN app.

That is for APPS you want your WEBPAGE to perform better, don't use a SPA, use Astro or something similar.

Might as well do everything in Assembly or C because it's faster right? Same argument. Development speed matters too.