For some reason, I have always thought of SLC as simply more reliable. Yes, more write cycles, but maybe I should use the term robust instead of reliable. To me, write cycles is one thing and reliability/robustness is another. Similar to the way spinners are more highly engineered for server environments. Not just longer lasting, but better able to stand stop/start cycles, heat ranges, etc.
I am no scientist, just an enthusiast that has always appreciated hard drives and been willing to pony up for better drives.
Funnily enough, I have never had a catastrophic HD failure. I like backups too 🙂