I've got some free time coming up. Finished a project in Go & Vue & Postgres. Really enjoyed that tech stack, but feeling the need to stretch more.What should I learn next? My inclination so far:
- mobile dev (probably Kotlin on Android, not so keen on the Apple stack, and I run Linux desktop)
- Lisp (and climb the Emacs learning cliff)
- a games engine (possibly Godot, which I like the look of, though Unity is the elephant in the room) 
- a desktop toolkit (GTK, Qt, Tk, I guess... any others?)
- improve my Python and get a ML project doneWhat's the next big thing in software that I need to be aware of?