There are 2 big reasons to use FlyingPress.
It beats other cache plugins like WP Rocket when you compare their features/optimizations (and has for a while if you also compare their changelogs). It’s also #1 for optimizing web vitals.
Second, FlyingCDN’s Cloudflare Enterprise lets you use any host you want and promises a 50ms global latency (a big reason why my TTFB is so fast). Which means you’re not stuck with Cloudways/Rocket.net who offer Cloudflare Enterprise, but overcharge for subpar performance. I left both for ScalaHosting’s VPS who uses faster CPUs/RAM/storage but the choice is yours now.
Here’s the checklist: configure FlyingPress, keep Perfmatters for the script manager and possibly other settings not supported by FlyingPress (or give you more control such as lazy loading), replace your CDN with FlyingCDN (if you’re moving hosts, do this beforehand), and join the FlyingPress + WP Speed Facebook group to get updates from Gijo (FlyingPress creator).
Use the docs to follow along.