So, brand new to DCS: World, and came across this topic as I was looking for info on a module for an F-4.
I've worked in software long enough to know that developers have to balance the time and effort (and therefore money) required to develop a product vs the projected revenue the product will generate. Add in the fact that any time spent on such a project is time not spent on some other possible revenue generating work, or even necessary non-revenue generating work such as bug fixes. So, while there is definitely demand for the F-4 and while I'd love to see a variety of F-4 variants, I just don't see it happening. Once you factor in that purchasers are going to want a useful AI back-seater, which is going to have to operate differently for each type, I don't see how they can offer multiple variants at the cost of a single mod, or even necessarily develop multiple variants each at the cost of a full mod each. Would they get enough purchases of less popular variants to pay for development, and how could they encourage people to purchase those variants that may not be their favorite?
That having been said, if I was picking variants, given that Vietnam was where the F-4 made its name, so I'd like to have a US Navy version (J), and a US Air Force (D or E) version. And given how many other variants there are, I'd like to see at least one more, maybe an F-4K or F-4M, and finally maybe some other version TBD, such as a late E. Now, how to pay for it all, I'm not sure. Maybe offer some graduated discount structure, where the first is at full price, the 2nd is at 75% and the 3rd is at 50% when purchased together.