Maybe some folks have millions of VC money to blow, but I would never build a VoIP or gaming (= bandwidth intensive) app on this.
We're pushing that price down pretty regularly, you can read some details about it here:
> Inflicting that complexity on you all would help with margin control, but ugh. What we've done instead is set a blended price that fits most apps running on Fly.io, and decided to just eat the extra cost from outliers. If you want to exploit that, run an app in Sydney with a whole bunch of users in India. We'll lose money on your app and you will win one round of capitalism.
With Fly you're getting the raw magic behind Lambda@Edge, CloudFlare Workers and every anycast DNS and edge reverse proxy service in existence, with a large chunk of compute, RAM and local storage to build out whatever exact combination of CloudFront or whatever else you like thrown in as part of the deal. Also if you want to skimp on backends, it's still possible to use their HTTPS termination (ala GCE) to reduce handshake latency without rearchitecting everything