I think it is unusual. As a software engineer who has a large circle of friends, loads of them know I use Linux, but literally no one cares or is curious about knowing more. And honestly I’m not interested in explaining. We talk about and do other things lol. I sometimes talk about differences and news about both with those who have jobs or interests closer to the IT business, and we have a short conversation about those news, but nobody asks me about Linux, and especially not Windows. It’s not interesting.