I actually purpose-bought a bluetooth smart switch, to which I have added a label called "The Internet" and a power strip to which the cable modem, router, home assistant hub, and whatnot are all plugged into.

That way if "The Internet" starts acting up, I can bluetooth-connect from the phone and power-cycle all the downstream devices, thus avoiding the "how to I get the wifi to commit suicide, but still be able to reconnect it?" situation.

Probably there's some other clever way, but that's what's working decently alright for me. :-D