I am a bit shocked by how popular this game is. All the signs were there, though. - Their previous game Divinity: Original Sin 2 was critically acclaimed, very popular for a pretty hardcore CRPG, and had long legs. - DnD has a lot of brand power and has been strongly in the zeitgeist for years. - There's a big cohort of millennials who have strong nostalgia for Baldur's Gate and who have plenty of money to buy games…
And DOS2 had the best combat in decades.