The introduction of Helminth made hoarding vs. tossing a very real consideration from that point forward, especially for people like me who thoughtlessly sold old frames as soon as the primes had the old builds on them. If DE is willing to introduce a system that forces us to re-grind old gear, do we really want to be selling anything and everything simply because we aren't actively using it? I for one am not willing to risk having to rebuild hundreds of weapons just to gain an anecdotal RNG benefit in a single game mode that's likely to change drastically within a year (see: Railjack)