I use Cloudflare tunnels to expose lots of small projects to the internet that I host on my home server. I don't want my home internet to be knocked offline because someone decides to hammer my network and knock me offline for a while.

Cloudflare handles caching of static resources, rate limiting, and blocking of bots with very little configuration.

Also, my ISP here in the UK doesn't provide static IP addresses, so Cloudflare allows me to avoid using a dynamic DNS service, and avoid exposing ports on my router.