Besides it is more cost effective. In my estimation it requires 3 flash drives/SDcards ( two of them as a backup just for the case) ~ $8-10  to keep SSS blob and  two pgp HW key (again one for backup, ~$60) and of this for all period, let's take  25 years. Your solution for the same period will cost $25 x 25 + cost of hardware (silver plan) or $100 x 25 + cost of hardware (gold plan)