In my world, it's been a tradeoff. In the past, it was the powerline buzz. Now it's the power company's smart meter. Periodically it rips away with s9 of buzz. But it's maybe once a week or so.
I've had no issues with LED lights, or CFL's that work properly.
My router does put out some RFI, but not enough to keep me from DXing.
Poor propagation? Yeah.
But I can sympathise with those who have worse RFI. One neighbor's washing machine put out alien sounds all over the lower HF, and another neighbor's twin plasma TV's wreaked tons of havoc all over the 40 and 41 meter bands.
The main problem with AM radio is the crappy antennas on most cars, as well as the fact that auto computers aren't shielded well for RFI.