It’s hard for me to compare to other languages in this space, like Go or Rust, because I have basically no experience with them beyond the very most basic introductory toy projects. My choices came down to Python (with Flask or aiohttp) or Swift with Vapor.

There were a couple of weeks where I wished I had just gone with Flask and been done with it.

But beyond the short term, now that I have it working, I’m glad I went with Swift. One big plus is that I can reuse a bunch of Swift Codable types between my iOS app and the web app. Another is that I feel like I have a better performance/concurrency story than I’d get with Flask.

Edit to add: I don’t think getting started with Vapor was any harder than with aiohttp. And for me, it was a lot easier than learning a whole new language like Rust.