At this rate, Zelda X will arrive in 2021

[Wyrdness]

Pavolink said:

And there are very well polished games made in less time. So no.

Again, the team needs to be efficient and make the correct decisions. If making an open world game was a problem, they should have left a smaller team doing that for a future Zelda title while the main one works on a near project. On top of that, we don't have any confirmation about the engine that the Zelda team is using, as past games from OoT to TP used the same modified version from SM64.

 

And how many of those games are like Zelda in design and approach?

OOT was in development since the SNES.