"they are also working with a lot of legacy code, and rewriting the physics logic could require essentially rewriting the engine from the ground up"

Not a chance. I could almost guarantee a relatively competent modder could solve the throwable physics issues with a day at their office. A vast majority of the time, these issues are unsolvable by modders because they locked everything down tight when they shipped the game. Give people access to the code/scripts, and they'll figure it out right away. Look what happened with Witcher 3. Basic access to the game's scripts and people solved FOV, disabled the softlock combat system and made attacks and signs go in the direction of the camera, disabled the auto-camera centering for the boat/horse and on foot (all toggleable individually), disabled the auto sword sheathing and/or the auto unsheathing, etc etc all within a day or two. NONE of that stuff was even vaguely possible for anyone but CDPR up until the second they pushed patch 1.08.2 and the modding tools. Capping your games like this is sheer incompetence, there's zero excuse for really anything but a fighting game with exact frame-count animations meant primarily for consoles.

Also, this isn't console. Windows 8 released? Games still run. Windows 10 released? Games still run. Upgraded your hardware in 4 years and it's monumentally more powerful? Games still run. Bought a new display to go with it? The games still run. Old games are still worth playing, and >60hz adoption is growing purely evidenced by the ridiculous number of new models being developed and manufactured by all the top display companies. Cap a game like this out of incompetence, and then refuse to listen to consumer feedback (which is exactly what they've done), and the game is likely fucked forever. If MGSV is capped to 60, I will not be buying it. There is ZERO, and I mean absolutely ZERO excuse for it, especially considering their partnership and cross-sponsorship deals with Nvidia. I hope Nvidia along with the failure that is the last Nvidia partnered game, BatmanAK, whip them into shape. I'd love to support a great product, but I don't see it as one if they cap it. If this was a first time port I could maybe understand, but it's not. They released GZ, a damn near identical title in dozens of ways, in which they got an outpouring of feedback from myself and others. They have far too much feedback, money, partnerships, etc to make the same ignorant mistake twice. I cannot support a conscious choice to screw PC gamers like that, especially not on top of all the nonsense microtransactions we've been hearing about.