We also should remember that most react apps are single page apps, and usually this .js file is aggressively cached on a CDN. Most interactions are close to ins

We also should remember that most react apps are single page apps, and usually this .js file is aggressively cached on a CDN. Most interactions are close to instant. Server-side rendering fixes the issue of time to first pixel. I think we don't really need to worry about a 10KB bump, especially considering how many websites are serving ads to mobile which are sending over MUCH MORE DATA. I have been traveling around to many 3rd world countries, and when I hit a website thats loading a little slow you know what I do? I wait for it to finish loading, or I refresh. One of the biggest things a site can do to improve speed is picking a good CDN (Cloudflare).