Cyberpunk 2.0 and 2.1 added some major changes to the base game of Cyberpunk 2077.
There's significant changes - the crafting and hacking/netrunning mechanics have had revamps, there's entirely different skill trees and vehicular combat is different. There's also the metro system in 2.1. Essentially while the 'story' and missions are not changed, the gameplay mechanics are often going to be different from when one plays cyberpunk 1.x.
You can, in theory download 'older' builds of cyberpunk so if you want to play the 'older' builds of the game its plausible - not sure why though, considering the 'reputation' it had
Phantom Liberty getting its own tag for its DLC content makes sense. Should we be updating cyberpunk 1.x questions for 2.0 or giving 2.0/2/1 its own tag?