To Epic? Not very close.
That is correct. There have been pen and paper RPGs for both for a long time - Fantasy since the '80s, 40K if we ignore Rogue Trader (and Inquisitor) which was RPG-adjacent, then since 2008, but nothing on computers except recent Diablo-style ARPGs. Even Age of Sigmar has a recent pen and paper RPG (which is surprisingly decent), but no signs of a video one. Oh in fact the closest to a real RPG was the Warhammer Online MMORPG. Nothing has come close to that. RIP.
I think the major issue is that GW like to massively interfere with and micromanage the lore. With a war-oriented game that’s less of a major issue, as you essentially run the story by them, make sure the units are right and they only need to communicate so much. They don’t care about rules accuracy, interestingly, just lore. But with Warhammer Online, Paul Barnett was basically acting as a 24/7 liason with Games Workshop, they had meetings pretty much every day, and any kind of Bioware/Witcher-type game would likely need similar approval as it was written and developed.
Then on top of that, unless you can sign a very favourable deal, you have limited rights to what you’ve created (and GW are notorious for playing hardball with rights), so if you were planning a series or the like, they may simply go “yeah no we decided to go another way”, or maybe they cancel the game it’s based on, or update the setting, and want you to reflect that.
Warhammer Fantasy would be a lot safer than 40K for two reasons - it’s a dead line, so will never change, and because it’s a dead line, the licensing requirements are likely to be less onerous. Still, I really wish someone would make a tactical RPG with 40K (not starring Space Marines because for god’s sake they’re barely even people - even Mechanicus are more human).
Game-wise I played 13 hours of Monster Train, which is like, Slay the Spire, but with a kinda-sorta lane system, and you summon monsters (demons, plant-people, fish-people, scarier demons and candle-people) to protect the heart of hell, which is on your train, from bad angels who are invading it. Okay it doesn’t sound much like Slay the Spire but it really is. It’s kind of less about tightly refining and adapting your strategy than StS, and it’s more initially approachable, but at the same time it’s very easy for one slip-up to end in tears to an even larger degree. Visually it’s a lot slicker than StS, and the interface is mostly a bit better, it doesn’t have quite as much style. That said it’s generally a bit more fun and approachable-feeling, as there are far fewer “risky choice”-type decisions generally.
Given I played 13 hours in like two or three days, it’s obviously pretty addictive/involving, and I’d recommend it who likes StS but wants something a bit different and maybe a bit more tactical and less aggressively synergy-focused.
The only real criticism I have is that the “champion” monster you get at the start will have two out of a number of variants randomly available at the start, and it seems to me like some of the variants are distinctly worse than others, and if you get a choice between mediocre ones, well, that’s going to make your life much harder for a long time.