Had a QLC Samsung 2TB SSD, it had probably 4G to 100G wrote to it each day and had data read from it each day, it ;asted a whopping 8 months before it failed, even the 1Tb versions only lasted just over a year.
I am avoiding QLC in the future, will stick to SLC with Raid for "Important" data and then MLC drives for other stuff with Raid.
None of it is mission critical so if it is lost it's not a big deal but more of an inconvenience, having to load back from the backups.
Be interesting to see how much the reliability has improved if any on the 9th gen compared to the 2nd gen I had.