Originally posted by Aristophanes Zooms outsell primes by about 6:1.
You need top-flight f/2.8 zooms to make any market APS-C or FF. Look at M43. They all came out with zooms before primes.
A system is enhanced by its primes, but is made but its zooms.
this is the one thing that needs addressing. As much as I am a prime only guy 90% of the time, and my main zoom a sigma 24-70 2.8 is FF Pentax needs to launch at least 24-70and 70-200 2.8 zooms to go FF. Of course they could do a DFA job on the excellent FA*24-70 2.8 for one of them, and the same on the FA*80-200 2.8. not a major amount of R&D or effort required for that. I don't know if they could deal with Tokina on the 16-28 2.8 to get a good FF wide out quickly, but a 12-24 even at a slower f4 with WR would be a better item in any case
Certainly they could go to market launching the first 2 (which many apsc users would like as well myself included) with a roadmap for the wide zoom and even longer zooms and missing primes (which could also be mined from upgraded older designs like the 250-600 and the nice prime glass that is no longer there (20,24,85,400 etc). Sony certainly did not have a complete assortment at launch, neither have any of the m4/3 brands or samsung etc why is it a requirement that Pentax alone must have a complete lens line before launching a new Camera body?
So though this part of your arguement is valid, it really isn't an insurmountable issue at all.
Ricoh has capital, and apparently some wish to go after this market and experience taking market from what will be the biggest competitor here as well.
they may never release FF and just choose to focus on apsc and milc but I highly doubt it. All the press releases sound like they are in it to grow not slowly fade away. FF may not currently be the biggest part of the market but it is a driver for all segments, and the cameras on a per unit basis are far more profitable than the volume models as a matter of course. higher end always equals higher margins to offset the lower sales volume and meet ROI goals