"How long is the endurance now?"
A good question, and one not answered by the waffle. So I'm going to guess, and I'm going to guess the number is actually too low to be marketable so it's somewhere where you'll feel positively uneasy about the thing holding your data. TLC? >30nm process? A hundred cycles, two hundred if you're lucky. I think that's optimistic. The controller shuffle is where the "many variables" come in, and a great excuse for some marketeering and obfuscation. But not something I'll trust without backups to disk AND tape.