[gpm]

Personally I don't worry about it, but I wouldn't blame other people for doing so.

A browser is a very complex tech stack and it wouldn't surprise me in the slightest if there were vulnerabilities exploitable with a MITM. An airport would be a natural place to try and attack computers, lots of people with lots of money many of whom are doing things like moving that money around and many of whom won't think twice about connecting to an unsecured public hotspot.

There's also all the other apps on your computer, how frequently do you think electron-app-foo-bar updates it's chrome version and what are the chances it's using one outdated enough that there are known openssl vulnerabilities against it?

I don't think third party non-HSTS traffic is that much of a concern these days, both firefox and chrome block http traffic from https pages by default.