There used to be a time when pretty much every role-playing and strategy game out there was turn-based. That was partially due to technological restrictions but also due to the fact that these games were derived from pen & paper rpgs and board games which are both usually ‘turn-based’.
In the early nineties, Dune created the RTS genre (at least on the PC, because Herzog Zwei was Sega exklusive) or, as some would say, changed strategy games to be real-time instead of turn-based. At the same time games like Ultima Underworld did the same for the RPG genre. In both genres the change usually implied the change from boards to analogous movement. And interestingly, in the RPG genre, it also implied a change from character parties towards single character games.
Yes, Dungeon Master and its imitators, i.e. ‘the subgenre of dungeon crawlers’ (revived by the great Grimrock) had a little headstart compared to the rest of the RPG genre and, yes, real-time-with-pause-RPGs revived character parties, but that didn’t change what happened next: With real time combat being new and exciting and turn-based being (or being said to be) old and boring developers ceased to make turn-based games. Not because all devs were morons but rather simply because no one – including gamers – was interested in turn-based games any more at that time. But even if we (and hopefully you RPG vets out there) are eager to see turn-based combat revived, we have also gotten used to the amenities of real-time, regarding, e.g., the exploration of the game world. For us that meant that we would have to feature both real-time and grid movement.