I remember this game I played as a kid, Final Fantasy Tactics Advance, had a similar mechanic. At one point replaying it, I realized that enemies would infinitely re-equip their weapons after you stole from them and could be used to farm for money and EXP at the same time. A few key enemies, however, had a low % chance to re-equip endgame equipment instead of their regular gear, giving you access to busted abilities like Doublecast and Stopshot early, or even limited items like Ribbons. It was a ton of fun to progress through the game stealing shit left and right, one of my favourite implementation of the Thief class in any game.
Obviously the main difference here is that 1) there is no other way to get these items in RSE and 2) it's not a mechanic you engage with at all in normal gameplay, making it even more unlikely you'll stumble on to it. However, I would be lying if my first reaction to that reddit post wasn't "damn, that's super cool!" At the time, these ridiculously convoluted hidden mechanics were probably designed to sell guides, which was scummy, but in this day and age I find they really add to the charm of older games. Kinda crazy that we're still discovering this stuff.