Similar thing happened to Diablo II recently as well. Blizzard added a new class and couple of quality of life updates, after not touching it for over two decades other than the pretty authentic resurrected remake. Some of the QoL updates such as loot filter are very long overdue (integrated by competitors and have been asked by the community for years). Blizzard even sent surveys looking for player opinions about further updates for this 25 years old game. All these while D4, the one that should be their flagship product has its expansion announced. I believe there is something other than nostalgia that makes D2 superior than all successors. I don’t believe current Blizzard is capable of adding contents without breaking that authenticity though.