Here’s the point, he probably should not be replaced as-is. His trademark stubbornness has gotten the free software community in trouble before, and while admittedly that same stubbornness is what has allowed the FSF to persist in the face of corporate attacks over the years, that same stubbornness has also prevented the FSF from having a firmer standing in the software community, due to its own ideological purism and reluctance to collaborate with less strict actors like the Open Source Foundation. During the time where Stallman was temporarily banned from the FSF, I could see an ideological move towards leniency. Before Stallman left, they kept complaining about users that didn’t quit the entirety of proprietary software cold-turkey (and socially isolated themselves as a direct result). After Stallman left, though, they started to go for an approach they call the “freedom ladder”, where they request people to start using as much free software as they viably can.
But if he absolutely has to be replaced as-is, it’s incredibly difficult to find somebody with the same degree of insistence. Eben Moglen was, in my opinion, the most viable candidate, but sadly he was recently outed as an abusive employer.
There’s also a nifty optimization detail that was included originally in Breath of the Wild to deal with memory constraints, and eventually weaved as both a core part of the plot and a balance mechanic: the Red Moon phenomenon, that resets the state of the overworld at regular intervals. The developers originally explained that at the first stages of development, they had to deal with the fact that the game would eventually run out of RAM while tracking the status of every single enemy, so they decided to add a way to clear the slate, and settled for one of the best ways to integrate it in the lore of the game - explaining it to be caused by the malice of Ganon making all the slain creatures go back to life. And in an open-world game with weapon degradation, it’s highly appreciated to have a reliable source of additional weaponry, simply by waiting for the next Red Moon to defeat a few more enemies and take their weapons. I doubt that degradation would have stuck in the game if it weren’t for the Red Moon making the pull-and-push of resource management balanced - without it, there would be a point in the game where Link would have exhausted all available sources of weaponry and be doomed to play the pacifist for potentially the rest of the game.