Cloudflare is cool now, but what would happen 10 years from now when they get enshittified while handling majority of global web traffics? We would be truly fucked.
Cloudflare has much more impact than other cloud vendors here simply because they MITM their customers by default. Combine that with ever increasing market share, cloudflare has the potential to tap into data not even Google analytics can collect because they're able to see all unencrypted data following through their reverse proxy. If they decided to up their analytics game, you won't be able to block their data collection with ublock origin.