A 2-3 year grind followed by nothing to look forward to in terms of gear upgrades for another year or so does not and will not work with this game and its community in general.

People are already complaining about a 3 week minimum to get an eso weapon, what dya think would happen if it was 2-3 years?

The main focus of PvE and endgame has been and will continue to be gear-grinds that eventually change to glamor options. The community is based largely of casuals/semi-casuals that expect rewards/upgrades ASAP for doing content.

Tl;dr wouldn't work thanks to how the game has been which led to how the community is.