Rusty wheel arches.
Broken road spring.
Rear wheel cylinders.
Brake pipes and hoses.
All replaced and repaired by myself, and I considered each of these a wear and tear item due to age.
I liked it. It was old when I bought it, and I ran it for 2yrs.
The interior was in incredible condition, and was still good when I got rid of it.
Insurance wasn't bad, performance and comfort were acceptable, but did find that tyre brands made a phenomenal difference to road noise.
Handling was superb, never any problems wet or dry.
My only complaint was the fuel consumption. The best I ever achieved on a run was 49mpg, and the norm was around 40mpg. This was all longish distances, minimum journey time an hour, and all on major roads, not exceeding 60mph. I considered this a nonsense for the size of the engine, and the way I drove. (It was the 60bhp variant, although my friend's 50bhp variant was exactly the same.)
I am not being funny, but what do you expect on an engine where it dates back to the 1960's, the basics of it. I would have said 49 mpg as the best is good. If you want good fuel consumption, then buy a more modern engine. Even an average of 40 mpg isn't bad even today's standards.