GM mode vs GMing in the game.
GM mode isnt a lot of work, but its also not a lot of payoff since youre realy just modifying the existing game.
If you want to run a full campaign in OS2 (or BG3) youll have to do Video game level design which is much more time consuming than drawing maps for roll 20.
at least if you want it to look good.
and then youre limited to what the game lets you do. Sure it looks cool and all.
but i dont think a video game will ever supplant the PnP expirience.
especialy the at-a-table expirience.
ive played quite a bit of roll 20 but at the end of the day, real DnD is the kind of DnD where you sit together, eat some unhealthy food, drink some cold beers and have a blast getting killed by morblorbs or whatever other bullshit im coming up with for this week