The continuum thing is smart: I'm going to do it with all the games.
Least Open World
0 -- FS, TFH
1 -- FSA
2 -- ST
3 -- SS
4 -- OoA, MC, Z2, MM
5 -- LA
6 -- PH, TP
7 -- OoT, ALttP, OoS
8 -- WW
9 -- Z1, ALBW
10 -- BotW
Most Open World
For this poll, I'm counting 8 and above as open world.