I'm curious, in what niches are people using Swift for new applications these days? I've enjoyed working with Swift in the past (albeit in very limited capacities), but I haven't personally come across any Swift-based initiatives in a while. I had high hopes for Swift for TensorFlow, but it was ultimately killed off.
I honestly use Swift as a scripting language for a lot of various things. Most often, I use Swift for GUI scripting as a replacement for AppleScript (sometimes I use them together). I absolutely adore Swift as a language.