[seszett]

Not the first time I hear this but I have about 20 ESP devices on my WiFi, almost all of them pushing data regularly and polling for instructions (I don't use HA, but a simpler home made solution) and I have no problem at all.

[meatmanek]

It helps that the IoT things almost invariably use 2.4GHz while your data-hungry computers and phones usually use 5GHz.