I agree that all military aircraft devs should drop FSX as a platform and switch to DCS but sadly it doesn't seem to be happening fast enough, if at all.
I guess FSX is probably easier to program for and still brings in the money...
Hopefully when one developer makes an absolute killing in DCS with a high fidelity fighter, others will see that there is a huge market here and jump ship too.
I swear, the first team to get a modern (post 1970) fighter out with AFM and fully clickable, realistic, accurate cockpit is going to make an absolute fortune.