Never make the mistake of co-relating a ssd reliability with its TBW rating. TBW rating is purely a number agreed upon by technical & marketing team & has nothing to with reliability of a ssd. Though ssd failure rate is typically lesser than hdd but when they fail they do so suddenly & without any warning so always keep backup of important data in another drive/cloud storage.500TBW is enough. Even if you write 100GB per day the drive is going to last 13+ years.