> So they decided to sit out. And cue the fall out.

What's the play ? They may get new customers by making an app for the apple pro, they get nothing if they don't.

I don't the economic interest in waiting.

Software development is expensive. Like eye-wateringly expensive. A team of developers, product, designers, testers on a new app costs a big amount of money so its a gamble each time.

Without a large audience, spending money on porting to AVP is either money down the drain or a bet on a large audience coming along soon.