Reading to Paddington is the most congested route in the country apparently. At peak times the passenger / seat ratio is around 2. I did it for a week before buying a motorcycle.
I bought a car to replace my train commute, and promptly sold it after a week of hellish traffic and "park and ride" car parks where the meagre 300 spaces fill up shortly after 6.30am. This isn't even London.
I did that once. Never again. To be honest it didn't take long, which is good because I was being constantly gassed by people's arses.