A modder just released a tweak to NPC movement, de-spawning and AI. It works very well compared to what the game engine does and all it consists of is .ini tweaks.
And it WORKS. The crowds act way better, avoid objects way better and are not blipping in and out of existence or changing into different people just by not looking at them for 2 seconds.
But it's clear that when a fight breaks out, NPC's still vanish into the cloud district and completely de-spawn, so fixing that requires more in-depth work than just tweaking an ini file.
There are literally a few million people who want to have content which CPDR cut from the game and will never put back in, so as long as the modding community is supported, someone somewhere is going to find a way.
If no official modding tool is released -which I predict, as I don't think the execs have ANY interest in allowing mod support- then the modding community will make some kind of mod organizer or rudimentary tools.
Frankly, as-is, if this game is 100% complete and just gets bug fixes, it won't last long without mods. 80% or more of the material showcased even just 2 months prior to launch is not actually IN the game.
But there are traces of this cut content all over the place. Which may be a spring board for modders to bring it back, perhaps?
Examples:
Property Deeds: There are SEVERAL property deeds in the game (the first being right outside V's apartment) usually laying on the ground and looking like ordinary papers. However, in 4K resolution and zooming in, you can read the details. They list things like farms, apartments, etc. in the game world. Each is also flagged as a lootable item, even though you can't pick it up. I take this as the remains of the ability to purchase property.
Interior Cells: If you have ever clipped into a building while doing parkour, you can see how easy it is to move around (or fall through) game space inside buildings. So making working interiors and changing locked doors to unlocked, is entirely possible. Expect modders to build new locations like crazy once they figure out a stable way to do so.
Driving HUD instead of mini map: Around a few warehouses, if you tag an item, you can see the white dots from the mini map on the ground. Usually only for a few feet and under rooftops, but it pops up now and then. I don't think this is a 'glitch', but the remains of the HUD directing you where to go, rather than just having to drive via the mini-map. While some players don't like having directions to an objective popping up on their HUD, many prefer it so you don't have to take your eyes off the center of the screen to look at the mini map.
Item Descriptions: From the mono wire being able to hack people to other item descriptions, there are a few dozen examples of gear and even junk being intended to do SOMETHING in game that it currently does not.
There is also just a plethora of small details that really, really need fixing. Any comparison video between CP77 and GTA or Saints Row shows some very glaring things missing that would make the game world 1,000 times more immersive, fun, and interactive, from adding water splashes from weapon and grenade impact, to being able to shoot vehicle tires, and massive improvements to enemy and NPC AI.
Allowing modding would only make the game BETTER, and open the potential for it to become the next Skryim and played by people for 10+ years. Otherwise, after 2-3 playthroughs, people will be done with it. 800,000+ PC players have already stopped after a single playthrough.