Except there is no reason to assume, in fact it is illogical to assume that today's TLC or QLC (or [fill-in-the-blank]) technologies are still in the same dark ages as their first generation ancestors! What we can easily assume is that manufacturing techniques as well as the refinement of the raw materials, as well as design and engineering all have improved to help extend and improve quality, reliability and endurance.
Yes, I'll concede that manufacturers' constant desire to cut costs and improve profits often results in a couple steps back. But the state-of-the-art is still multiple steps forward from the first generations.
Today's internal combustion engine uses basically the same technologies as used in the Ford Model T. Does that suggest today's internal combustion engines have poor reliability and endurance?
Note this from the How-To Geek,
I haven't made any assumptions. There's inherent limitations to TLC and QLC that means they won't have the same endurance as SLC chips.
I don't know that its a step back. I think large cheap drives are great for the market, and in fact, the larger size also helps to mask the vastly lower endurance.
Perhaps there'll be a successor to QLC that goes in a different direction than, cheaper/less endurance. That would be great.