Whenever I encounter a server-side rendered app which _doesn't_ work well, and I make a cursory examination of why, I usually find it's down to poor choices. A

Whenever I encounter a server-side rendered app which _doesn't_ work well, and I make a cursory examination of why, I usually find it's down to poor choices. Ads causing reflow, embedding of other elements (off-site) with poor performance, the Cambrian explosion of trackers and other cancerous marketing-related cruft, labyrinthine page layouts because someone wanted a pixel-perfect visual. All things which are not the core app itself. This leads me to suspect that most apps would work just fine with a few easily anticipated exceptions.