Looking at the pool of SSD products in the studio, none of the SSD have made it past 20TB written in a 12 month period. The reason for the lower TBW has to do with most activity is read, such as loading Windows at startup.

Samsung 980 PRO 2TB686 hours3,236 GB4.7G GB/h
Intel 665p 2TB7,119 hours16,824 GB2.36 GB/h
Team Group L5 480GB SATA12,589 hours13,695 GB1 GB/h

One year is 8,670 hours. The Team Group SSD has been in use for several years in a laptop which was powered down much of the time. The Intel and Samsung SSD are more active in the primary gaming box.

The reason for the higher GB/h for the Samsung 980 PRO 2TB is that it is new and software is being installed. Once the installations are complete the context changes to read which is similar to the older Intel 665p SSD. The old Team Group SATA SSD is older and the writes per hour are even lower. The chart shows the population of SSD and operating hours to make it clear that SSSD endurance is more than adequate for many years of operation.

Over time the GB/h will fall primarily as games, once installed are read only when loading. Many have replaced smaller capacity SSD with larger ones which is driven more by the size of modern games than anything. Halo: MCC is over 120GB in size and Halo: Infinite is expected to be even larger. Loading Destiny 2 from a SSD is much quicker.

Recently 4TB SSD are starting to become available but the cost of the capacity is still undesirable. It seems that higher capacity M.2 SSD are almost double the cents per GB of lower capacity models.