Earlier quoted context omitted.
QLC isn't an issue for consumer NAS- are 'you' seriously going to write 160GB/day, every day?
QLC have quite the write performance cliff though, which could be an issue during use or when rebuilding the array. Just something to be aware of.
Not saying premium drives dont have their place- but for 95% of people $200/TB ($100 premium over lower tiers) is a waste.