My stairway/upstairs lights are on a 4-way switch. I’ve never researched it but presumably one could build out a 5-way or 6-way switch by adding more switches wired the “middle” way. I’m sure there’s a term for the two wire switch in the middle but I’m no electrician.

The same cost to get an electrician out to wire in one 3-way switch paid for an apartment of smart (plug-in) outlets for me. And since it’s a rental, I would not have been allowed to actually add the 3-way switch.

Have you seen a room wired with a second lightswitch specifically for the bedside? I'd be interested to know if anyone's done this.