I transitioned my recipe app with ~ 80,000 images from Cloudinary to a combination of Backblaze B2 + Bunny.net a few months ago. I heavily use the resizing and optimizing features.
It's saved me a ton of money, but if I could have used B2 + Cloudflare with their 0 bandwidth alliance, I could have saved more, I think - haven't done the math though.
In the grand scheme of things, though, I've worked with Bunny now and love the interface, and performance. The one time I contacted support, I spoke 1 on 1 with , I believe, the founder of Bunny. He was cool.
Cloudflare is doing some killer things, excited for that. But glad to see we have small name alternatives to everything (S3 to B2, Cloudflare to Bunny, etc) that can compete on price and functionality.
Good stuff, though! More options the better!