SAO is linear, everyone is a fighter class. gender locked account.
Yggdrasil (Overlord) is pay2win.
Grimgar is hyperealistic difficult, casuals wouldn’t bother to play. possibly genderlock account.
Eldertale(Log Horizon) is OPEN WORLD and SANDBOX!.
@Apple_Cider
tis probably just IBM VR jumping into SAO franchise for advertisement. its still visual based.
the lore SAO system Nervegear is more complex as it overides the sensory nerves to simulate the VR world within the brain not the eyes. thus you can live, breath, smell, and taste, and even feel pain and 16.5 pleasure. that is far too complex and dangerous aswell.