The thing is, there may be more DVD-A capable machines than SACD machines as he asserts (but I find this dubious though possible), but those are people who bought a DVD player that just also happens to have a DVD-Audio badge. Chances are they don't know they have a DVD-A player or even what a DVD-A is. These people aren't necessarily turning around and demanding DVD-Audio discs. the fact is SACD titles are outselling DVD-A titles, plus there are far more SACD offerings. People that buy an SACDP are aware it's an SACDP and that's why they bought it, so they then go out and buy more SACDs for it.
IMO, he's blowing it by hitching his wagon to just one format. If you are buying expensive/obscure Arcam gear, you are presumably educated enough about the market and digital. So you would likely be educated enough to know there are universal players. In 18 month's time just try to sell someone an expensive new CDP/DVD player that *isn't* universal. He sounds like he's complaining that they just can't overcome the technical hurdles to add SACD, sounds like Arcam's problem, there are lots of hi-end universals here and coming. I guarantee he will be singing a new tune in 18 months time.
Mark