Those numbers can go up really quickly if you have things like eReaders, Steamdecks, other handheld gaming devices, smart watches, security cameras, birdfeeder cameras, smart TVs, smart speakers, VOIP adapter for landline phone, DVR, tablet, gaming consoles, smart power plugs / LED lights /etc, smart thermostat, wifi-enabled toys (drones, etc.), smart appliances (washer, dryer, oven, dishwasher, refrigerator, airfryer, microwave, pressure cooker, coffee maker, all are available in wifi-enabled versions right now to either allow you to schedule operations, adjust them on the fly, or alert you when they are done). Robot vacuum, robot lawnmower, smart litterbox for the cat, smart cat/doggie door, smart locks, smart toilet, smart pet food dispenser, etc. etc. etc.
And most people that have smart lights don't have just one, they have a whole bunch of them, each connecting separately to wifi.
Pretty much every single thing that plugs in or uses a battery will come in a wifi-enabled version these days, whether it makes sense or not. You can even get a wifi-enabled toothbrush for crying out loud, which can track your (or your kids') brushing habits.
...and then multiply that in multi-person households.