The biggest loss for me was Termux. I had lots of scripts and such that I ran, plus just having a Linux environment in my pocket was nice. Luckily I found ish which gives me alpine Linux on top of a virtual x86 machine as provided by a JITC layer. I can host PWA apps out of that environment for local use. Of course I can also ssh to my unix like machines from there too.
I am starting to tinker with swift a bit more too. As with google, I could buy a dev key to deploy my own apps only this way I have all the window dressing and end to end encryption on cloud storage.