[NegativeK]

Agreed.

They sell UL rated models, have an option for cloud connectivity but zero requirement, your switch still works if the Shelly loses connectivity with whatever home automation server you have, and it's a small box that you wire in behind the switch.

[Carrok]

They also make drop in replacement dimmer switches. Even easier than the small box style. https://us.shelly.com/products/shelly-plus-wall-dimmer