I was extremely lucky to buy WC1/2 when it was on sale. And it was an incredible time, the possibilities of having more games on their platform from Blizzard. I was hoping we'd get a DRM free version of their classic games. But it wasn't meant to be.
Blizzard one day might've had a look at their BattleNet numbers and realised they could be getting more people playing and they can earn more money. So they had the bright idea with Microsoft's Assistance of course, to break off the partnership they had with GOG and we had to either buy their classic games on BattleNet or Xbox Game Pass and install BattleNet to play.
Now you'd think them being Blizzard it'd all work and be perfect, after all, it is their game. But no! They, somehow unsurprisingly made their games worse! I have more faith GOG understands their game better than Blizzard does.
WC2 is a superior game over WC1. The gameplay mechanics was refined and felt a lot better to play. The story was greatly improved upon and better realised, the characters had more depth and the cutscenes while dated was proof Blizzard at the time could make 3D animation look good.
This games once again deserves the GOG Preservation program. Blizzard is desperately trying to regain control of their games in hopes we'll flock to their awful services once more. This game is the TRUE birth of the WarCraft Universe. While WarCraft 3 ascended into greatness, WC2 was the reason it ascended.
You may wish to read 'Tides of Darkness' which is a novel adaptation of of this game that gives a better perspective of the WC Universe. One of my favourite WC novels.