You probably just saved me a lot of money. I never even thought about the limitations of switched-live light switches when it came to Wi-Fi. I have mobility issues that will probably just get worse with time & thought individual Wi-Fi switches would be advantageous over a hub & spoke model when using portable devices & Amazon Echo. RF dimmers definitely seem to be the way to go as they will work with switched-live &, hopefully, won't connect to dodgy unknown servers!
I'm so glad your blog appeared on my Google search this morning!