Brake work done several times.
The universal joint was replaced.
The alternator was replaced.
The transmission was rebuilt.
It developed a cold start problem. It would only start on cold days if the engine was cold.
It had lots of carburetor work.
The manifold cracked.
The suspension went bad after about 12 years.
This car had a 258cid and it would climb Everest.
It had no pick-up, but at speed it could cruise for hours at 75.
It was very, very good in the snow.
The front seats were very comfortable. The back seats, not so much so.
It was a good car for trips - the trunk held a lot.
I regret ever selling it. It was a workhorse, inexpensive parts, relatively easy labor.
"I regret ever selling it."
Don't! Today it would be an old crate made totally obsolete by 21st century car standards.
On the other hand if it were in good shape, it would be worth a few thousand dollars. Eventually anything rare becomes worth something.
It's also worth noting that the 'twenty-first century' cars of which you speak cost many, many times what this Hornet cost new or used.