There are certainly limits to the spontaneity possible within a computer game, but the essential aesthetic of "combine two words to cast a spell" is actually something the Ultima CRPGs did years before Ars Magica existed.
A spellbuilding engine with similar flexibility to a Minecraft-style physics-building engine could be really fascinating.
Magicians in Ars Magica are not "adventurers" with a staff and a mantle. They act as independent and powerful heroes with their magical shelters, laboratories, agents, and assistants. Every magician also has ordinary talents, such as fencing or leadership qualities, which are not opposed to magic but complement it. At the beginning of the 10th, Ars Magica planned to make a video game, but the project did not raise the required amount. And people gradually started to switch to playing Diablo 2 . In general, if we compare the service of the game Diablo 2 Classes - Skills for all Characters in D2R | Yesgamers.com and the Ars Magica service, then Diablo is still more interesting.
I've been a fan of Ars Magica for many years, and I'm very sad that there is no PC game for it. The setting is perfect for an RPG, with its combination of magic and historical realism.
Master of Magic always seemed close, and a Master of Magic castle even made it onto the front of a 5th Ed book.