It's funny too me because when BG1 & 2 came out folks acted like their was no market for turn based games anymore
That's absolutely right!
I got told at the time - repeatedly - that Fallout 1/2 were "outdated" because they were turn-based, and no-one was ever going to play turn-based CRPGs (or really other games again), and to be fair, from like 1998 to like 2010 there were pretty few turn-based games in the West.
I think two factors really served to bring it back:
1) Japan kept putting out turn-based games. Some series went action-based, but ATB-type deals largely vanished - with games largely splitting to be either turn-based OR action-based, no hybrids.
2) Board games became wildly popular with a big crossover with the sort of people who play CRPGs, strategy games, and so on. Obviously basically all of those are turn-based.
So then we got stuff like XCOM in 2012 and D:OS in 2014, both of which were very well-regarded, and a new generation got to meet RtwP in the form of Pillars of Eternity, Kingmaker, and so on, and their reaction was... to say "hmmm" and keep asking for a turn-based mode. Which the sequels to both of those put in.
So vindication at last lol!
Except maybe Dragon Age 4 (never played the DA series is it RTwP?)
Every DA game so far has a slightly different take on it.
DA:O was straight-up RtwP but with an important innovation - in-game, you could "script" your characters through menus, so whoever you weren't playing at the time could have elaborate conditional behaviour. Scripts existed for Dungeon Siege and Infinity Engine games, but they had to be created/edited out of game, and Infinity Engine games I don't think even ever explain this, you just had to know.
DA2 on PC was similar to DA:O, but refined the menus for conditional behaviour, and also clearly considered the conditional behaviour fully when designing abilities (which DA:O did not). Some people are bizarrely unaware of this - I had someone telling me DA2 "ripped out" the conditional behaviour - absolutely false, on PC at least. On consoles, DA2 had slightly different gameplay, in that you didn't click to move, but moved with the control stick, and didn't have auto-attack, you have to actually keep pressing a button to attack.
DAI made the DA2 console approach the default - no auto-attack for the controlled character, but you can turn it on in options. It made the characters a lot smarter by default, but also changed and simplified the conditional behaviour, linking it directly to abilities (which works surprisingly well, I didn't expect that). Click-to-move exists, but only in the "tactical" view, otherwise you move with KB/control stick. In general the idea has been to reduce the amount you need to pause whilst still giving you the option to be very pause-heavy if you want.
(NB DAI came out just before the "Return of the PC" era, hence the console-centric design choices. However to this day console-centric design choices remain normal, it's just PC gamers also usually now own gamepads!)
DA4 is slightly hard to predict as Bioware know they need a crowd-pleaser and nostalgia can play well, but what plays better is selling lots of copies, so it needs to be something accessible and fun (note that despite a lot of grousing about DAI from DA:O fans, and four big design errors*), DAI sold extremely well and kept selling for a long time). So I'd expect a combat design perhaps similar to DAI but maybe slightly more "action-y" on the character you're playing, whilst still allowing you to tell other characters who to act - probably looking more at conditional behaviour than pause, swap, cast stuff though. Either that or they'll go more action and make character swapping a major mechanic (a number of JRPGs do this), but that'd be risky, and if there's one thing Bioware needs, it's a game largely regarded as at least "good".
* = Hinterlands, too many zones, too many entirely optional but MMO-esque sidequests, the bloody table. All of these except the stupid table were overreactions to specific and common criticisms of DA2, and avoidable as issues by just choosing not to mess with them (but it really helped if someone warned you about them!). The table is unavoidable on consoles, but on PC you can get a mod to make it instant which suddenly takes it from "GRRRRRRR" to "Ok fine".
