AH was hard after Warbirds, IL-2 after AH. DCS I may some day try but probably need to upgrade my mill before it. Recommended system requirements are met but mobo and CPU are from 2014, memory DDR3, so I doubt it would rotate properly.
IMHO, line between game and simulator goes in controls. If it can be run with mouse and keyboard, it is on gamish side. Like in IL-2, some servers need joystick, some not. So, it's bit both.
DCS is a resource hog. No doubt about it.
Have you tried since they got multi-threading smoothed out? That seems to have been a big help for some with marginal systems.
Vulkan is supposed to help further someday.
I have no doubt that Hitech could add this extra levels of complexity and fidelity. I think the choice is intentional and not necessarily wrong. Here is a graphic of how I see the market (IMHO):
I think the position HTC chose on the fidelity spectrum is a nice compromise for a large chuck of the potential market. There are lot of players that would be a sweet-spot for.
There are always going to be more pure casual players on the game end. Way less on the fetish fidelity end. However there is also the variable of what percentage of the potential is being captured.
WT has a large potential as very approachable by a wide range of casual gamers. And it captures near 100% of that larger market. So yeah, they are just printing money.
DCS has a much smaller potential market that want the level of simulation pain.
But they capture 100% of it. SO they are making money.
I think IL2 would do better if they weren't so Russian\Eastern Front oriented.
I think the AH fidelity sweet-spot has a large potential market, but HTC is capturing very little of the potential. IMHO monetization model, graphics and to some extend lack of SP hold it back.
Now from this is might seem I'm suggesting that IL2 makes more money than DCS, but there is another curve not shown here and that is revenue from military trainer contracts. WT, AH, and IL2 have nothing there and I suspect it is a large portion of DCS' revenue. So I think DCS overall makes more than IL2, but nobody makes more than The Snail™. And everyone makes more than AH.
All of this is just my opinion of course and I could be full of it.