It hasn't been an issue thus far, but I'll see if I can make that clearer. I'm not implying that developers are writing macOS apps in Python or C#, but they are

It hasn't been an issue thus far, but I'll see if I can make that clearer. I'm not implying that developers are writing macOS apps in Python or C#, but they are writing Windows apps in C#, and they're writing cross-platform desktop apps in JS, as well as licensing servers and on-premise software (and that includes a lot--WordPress plugins, software like Sidekiq, etc.) in all of those languages. Keygen can either be integrated directly into a product e.g. macOS/Windows app, or it can be integrated into a server to transparently handle licensing (nobody can infer that you're using Keygen in this case using something like Little Snitch). Like I said before, there's a simple reason Swift and Obj-C aren't up there: I don't know them very well; I'm in the process of learning Swift, so that will change soon though.