I was lucky enough to spend a year or so working in Switzerland. I used the TR for summer transport a swapped to a trusty bright orange BMW 2002 for the winter. The biggest problem i had with the car was dynamo failure, but even that was survivable as old lucas dynamos are one of the few car parts you could buy from a Swiss Rover dealer in the mid 90s…
Another interesting fault was complete electrical failure, which normally happened on french autoroutes at night. At about 70mph all lights would go out, ignition stopped and overdrive would drop out….very disconcerting for both me & other motorists. Driving over bumps whilst slowing down would fix it. The root cause was finally identified as the live feed to the floor-mounted dipswitch shorting to earth (thats one of the many unfused circuits on a TR4A…)
Carrying Beer is just one use of a TR, a washing machine is more of a struggle, and a second engine (in the boot, with spare wheel removed) seems to affect the handling.