I'm a long term RPG player (a little bit more than 25 years, both digital and pen&paper, DMing and playing), I'm going to buy the early access to BG3 and I'm planning to play it on PC. Speaking about romance & companionship, I'd love to play it on couch co-op with my wife: is this option going to be available on early access? That would be lovely! ;-)
Local split-screen won't be available right away, unfortunately. To play multiplayer you'd need two devices playing over the internet. Split-screen is coming, though!