Turn-based combat is dying out in jRPGs because the public perception and marketing around them is deeply rooted in trying to pass themselves off as featuring retro-style gameplay, while the recent swing towards the turn-based style in cRPGs is because the Divinity Original Sin series managed to twist it into something revolutionary in comparison to the action-based cRPGs instead.

All it takes is a wildly popular turn-based game for the pendulum to swing back the other way, and vice-versa. While jRPGs have shifted towards action combat, cRPGs have been undergoing a shift into turn-based. Sure things sometimes get drowned out because like you said you have your mega hits like Tales of Arise (well Tales in general), Final Fantasy XVI, Final Fantasy VII Remake, Star Ocean, etc etc, but its not like the entire genre shifted.

Not to mention how many turn-based games are popping up on Steam or Mobile or just starting out on Kickstarter. Like we're getting the FF Pixel Remaster series, Yakuza has recently converted to that new turn based system, the Trails games (thanks to how mainstream-y Cold Steel is) are finally getting traction and popularity in the west (even though localization is slow as molasses. With the number of indies and smaller games, you'll always have choice. Sure a lot of your block buster RPGs will start to move towards the fast-paced action-based battle systems, but there are reasons for that. What's nice is that there are more and more RPGs coming out.

I've always favoured turn-based RPGs mostly because you can take your time, think about your next attack, and if things do start going south you have a bit more control of the situation.

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