It's not the top reason I switched to Netflix (and now a couple other streaming services), but it's the top reason that keeps me from going back.
When I travel and try to watch TV in a hotel, the commercials make it unbearable, I'll burn data from my cell phone before I'd try to watch anything on TV. I'm not sure if the commercials have really gotten worse or if I've just lost my tolerance for them.
When I moved and signed up for cable internet (sadly comcast was my only choice) they offered a year of free basic cable, I declined since I knew I wouldn't watch it.