Daring Fireball / John Gruber was one of the 5 people at the meeting so he had information directly from Apple, and if you read the article Apple specifically tell him they're in the middle of designing what would eventually become the 7.1.
Yes, directly from Apple... PR. Like I said. The article doesn't say they're in the "middle" (of what, a 5-year process to design a Xeon workstation??) - it says they're "hard at work". Gruber is even hopeful the new machine will be out the following year. Apple didn't specify how long they'd been working on it, but logically, it can't have been
that long given the time it then took to emerge. Given their assurances about how important the product was to them, you'd have to assume they weren't dragging their feet with its development at that point.
My entire point is that we have no idea what's going on inside Apple, and there is a tendency in this forum to just make assumptions and guesses and treat them as gospel
Well sure, but equally, we shouldn't just take Apple PR as gospel either. Apple invited a bunch of favoured journalists to the session because they were trying to manage a sensitive message. To get invited for a tour of Apple's R&D labs, followed by a chat with the company's key figures, is red-carpet stuff. I doubt Apple got much push back over their narrative, and to be fair, it's hard to blame the journalists. If they had, it would be the last such invite they got.
- i.e. that the 6.1 was a failure,
It sounds like you bought a 6,1, or at least like them a lot. Personally, I've got no animus towards the machine; it's a beautiful piece of design, and the spiritual ancestor to the G4 Cube (which I'm clearly a fan of). Any design is going to find fans. There will have been people out there for whom a compact, powerful workstation - perhaps for use on location - was
exactly what they were looking for. Those people were not wrong. Unfortunately, a greater number of people - at least in Apple's estimation, and I assume they've done the research - wanted a tower.
when for all we know Apple might have been incredibly happy with the 6.1, and were only disappointed by its inability to be upgraded.
I'm not sure what basis Apple would have been 'incredibly happy' with the 6,1. As a piece of design? Ultimately, it needed to be a sales success for them to be truly happy with it.
Anyone who has built an SFF PC is aware of the compromises involved. Apple took a hell of a risk miniaturising the machine that far, and it's hard to have sympathy for them when it turned out to have no room for development. It was a completely unforced error. They had no good reason to think that PC power consumption was about to take a nose-dive; they just got carried away with a cool design. Possibly because they wanted to show they could still innovate, without Mr. Jobs at the helm.