You might be interested in IntelliCode from Visual Studio. It's an AI-guided autocompletion tool, like Copilot, although dumber and less powerful. It can run in local mode [0], looking at your existing codebase (opened solution) to feed future suggestions.
In my experience the Windows-Linux split is around 50-50, but I've only seen exactly two people with Apple devices in my entire life here. Western Europe.
Don't worry I'm European and 90% of developers I know think exactly like you (and me). It's just that the HN crowd is typically North American, and people tend to like what they have grown with.