My daughter and her husband, Keith, just moved into their new, custom-built (by Keith) home and when it was newly studded and the electricians were milling about, my son went in and wired every room with data cabling, then went back and installed a full I/O panel and media server. In his estimation, you can always use data cabling for something and for now it's giving the best I/O performance you can get, especially for streaming.
Gordon's New Router Update:
I modified my new router settings as Danny suggested by separating out a channel dedicated to all of my IoT devices and while it improved things a bit, it wasn't enough to make my front light switches stable, just less unstable.
So I brought out the "Big Gun" and installed a WiFi range extender (about $40 bucks) just for the IoT channel and the switches, placed it about ten feet from the mis-guided switches and paired all the IoT stuff to the new channel.
"Buttah Boom, Buttah Bing!"
Those suckers have been rock stable since I put in the extender. So are a couple more IoT devices farther away in the house. The kitchen stove is probably happier, but I honestly cannot think of a good reason to use WiFi in a stove unless "Alexa" could control it and, thus far, the two of them really don't do much, together.
The "Verizon Whisperer" is as good with Internet of Things and Routers as he is with Carburetors!
Thanks, @DannyP!