Well depending on how you roll, I've had 2 routers - inside/outside. Guest network, IoTs, etc on the outside. Computers, Phones, Printers on the inside. Don't currently - but I also don't have many IoTs currently. Will probably return to this at some point but moved and haven't went out of my way to set it up "fancy" like.

But realistically, it's definitely better for the "masses" to have stuff that just takes care of itself. Grandma don't know how to update router firmware and people like that are why stuff like Apple's "appliance" model is better than Androids more hands on approach.