I used my +8 as a daily driver for 3 years in the 1980s. Had a roof then. I would then buy cheap cars with 12 months MOT. Cars to dump at airports and train stations. Had some real dogs all bought for under £500. BMW 528i (steering failed), Lancia HPE (loved it when it worked, sheared the brake pedal off the pedal box), Renault 12 (my favourite - ran it for 3 years, never serviced, 3 MOTs and only fail was when the horn fell off. Blew the head gasket, sold it for £250, what I had paid for it).
However, driving my +8 in the cold can be a challenge. In 1998 we were in Kitzbuhel for Easter. Left when it was -5C, no roof and tonneau was frozen, packing the car was a challenge. Got frostbite on my right cheek. Made it back to Cambridge in the day, just in time for a pint. 810 miles via Calais.