There's a perceived unpopularity with these genres. However, some truly great games like Baldur's Gate 3 are living proof that you can make a niche genre very popular. It's just that almost no one tries, or doesn't like the risk involved. That's why you don't see a lot of these genres anymore. Well, you DO see them, if you look close enough and include indie and A/AA titles, but a massive AAA title with big budget and advertising for those genres is pretty much non-existant (I'm not familiar of any other exception like BG3). I think big studios are unlikely to risk such things. Look for smaller game studios, they're much more innovative and either keep "dead" genres alive or they try mixing genres in innovative ways.