I have many nerdy friends who have been Linux users for ages. But most of them don’t know such a thing as Openwrt exists or have never bothered to give it a try. It’s a very fun piece of software to play with and can be extremely useful for routing traffic. Wondering why it isn’t more popular/widely used.
Fine on limited hardware like a router but if you’re going to use a full box for your router (or a VM), you’d probably want OPNsense for the ease of management and the fact that it’s targetted for hardware like that.