Yeah well they could add day/night as a toggle in the graphic section and advertise their game on stadia for everyone not being able to buy the expansive hardware...
A lot of the older BG fans already play on stadia anyway - i would guess- since they probably don't feel like paying a lot of money for fancy new games that sacrificed content for graphics in terms of storage...
Also, to be completely fair, I think Larian is also somehow riding not only on the nostalgia wave, but also on the initial re-found attention and spike in popularity for the old infinity engine games when Beamdog release the EE versions on android. I mean, I was always a fan of the old games, but that certainly intensified from the moment I could start up BG/IWD/PT from my frigging phone or tablet rather than booting up an old (probably pirated) game in compatibility mode on my subpar laptop.