This is an old MMORPG that holds a special place in my heart. It’s very broken in terms of today’s MMORPG & i’d love to re-create it with a more up-to-date game engine & game mechanics. Would a game like this be possible with Unity?
It is possible, but don’t buy overpriced MMO systems/ online multiplayer assets before you are absolutely sure you are able to acheive it.
Try to learn how to create a TCP/IP server working with unity first, if you achieve to do something that works, then i guess you have more chances of understanding how to use properly multiplayer assets you might buy.
MMO need you to optimize Server-side code a LOT, as if you don’t, your server will overheat really fast as the number of player increase.