That's not the way to help people with low bandwith or very high latency connections. They need more javascript, not less. SPA designs can actually make CRUD apps significantly more useable on slow or unreliable connections.
[Citation needed] I've run across far too many "mobile-friendly" websites that start by loading many MBs of JS libraries. And just flat-out fail to load if any of said libraries fail to load.
ps. "citation needed" is kind of obnoxious when it's something you can think through for yourself.