I used a Macbook Pro for 14 years and I saw exactly one crash. It happened within the first hour or two of use, but after updating the OS I never saw a crash again. Now Spinning Beach Balls of Death are a very different story. They weren't extremely common, but there were a couple of situations in which I could produce them consistently. In unexpected situations, there was a small chance of recovery if I waited for the action to time out or resolve, but most of the time it persisted indefinitely.
The situation in which it would put me reminds me of something I witnessed in high school. One of my classmates had big, bushy eyebrows and he showed up one Monday with a clean brow. Nobody would tell me who did it, but they were quick to say that the culprit only shaved one eyebrow, leaving him to decide if he wanted to walk around with a big, bushy brow on only one side or shave the other one off himself for symmetry. He chose the latter. In a lesser manner, that's how I would feel when I got the Spinning Beach Ball of Death - instead of crashing, it would leave me to decide how long I should wait before giving up and rebooting (shaving my other eyebrow).