They're in the game... you can even find a runner that used them. There are only so many explanations as to why our character is the only person in the world without access to them.
would not be that difficult to work into the game but may not be in the table top game for play balance purposes.
Yes, the logical one, I haven't played the tabletop but what I looked I didn't see any references to skill like that, one unofficial supplemental perhaps.
Single player game like CP 2077, might be neat but we can already create quite powerful character. But still Tech might be a bit underwhelming as it relies so much on crafting and grenades.