I made an account to reply to this post. (to be fair I was going to make an account anyways, but this sparked it)
I reached my endgame, and I'll tell you what happens.
I didn't reach my keyboard endgame, but I did it elsewhere where gear-whoring is a serious thing. I picked up longboarding very seriously about 6 years ago. I don't mean cruising, casual riding, et cetera, I worked my ass off for multiple hours each day to get good at racing, to the point where I would have done it professionally if it was in the cards for me (there's no money in it, and essentially you lose money just by traveling to competitions- as a student, this was not an option for me) but instead I just went towards the extreme end of casual. I won't bore you with the details, but essentially high grade boards involve three parts, those being the wheels, the turning mechanism ('trucks'), and the board itself. There are thousands of boards, 'trucks', and wheels, all with very different riding feels to them, and I spent five years making my setup. I bought over 20 pairs of wheels, 10 trucks, and 12 boards, mixing and matching my setups and tuning them to find what truly worked for me. In this sport, your connection to the road depends on your board, and when you're racing at 50+ MPH, you have to be damn confident in your gear.
It probably took me 1000+ hours of tinkering and riding to figure out what worked best for me, and eventually I found it, the one setup that I could not improve with any technology on the market, at least for me. It took a lot of money and a lot of time raging when I'd spent an hour assembling a board only to find out a few hours of riding later that it didn't feel right for me. I went back to the drawing board again and again, but one day I finally got all of the right high-end gear to complete my journey to make something that enabled me to feel truly comfortable riding. Most people who longboard seriously never actually achieve this, and pros get custom gear made for them to get closer to the endgame.
So I'll tell you what happened- I was finally satisfied. I can pick up my board, ride it, look at it, and never find a way to improve it, down to how many turns I tightened the trucks. So what happened? I stopped caring about getting better gear. I was done, and that was out of my mind. I could focus exclusively on riding because I never again needed to go back to my garage and change my setup. Hear these words from someone who has actually reached endgame, even if it's not a keyboard endgame. You probably won't go onto Geekhack or Deskthority once you reach your endgame, because you don't need to. There's the chance that you really like collecting gear, but from a practical standpoint, once you find your white whale, you won't be searching for another one. You don't sound like a collector to me, so I can assure you that once you find your keyboard, the perfect keyboard for you, you won't need to come back and keep looking. It sounds obvious but it's not. If you are purely in this because you want a perfect typing experience, then yes, if you put in the work, you will eventually drop this as a hobby. That sounds somewhat sad, doesn't it? In a sense it is, but it's also not, because haven't you achieved what your goal was in the first place?
I might get flamed because this isn't strictly keyboard talk. I don't really mind. I'm still searching for the perfect keyboard for me, and as a perfectionist it will certainly take me a while, but mark my words: When you reach endgame, the only feeling you will have is satisfaction.