Why should he wait until something becomes impossible, rather than less than ideal? Sometimes you just need to see the writing on the wall.
He writes "As noted, I've been happy in the relatively free Mac world. But given the slowing pace of Mac OS development, there's reason to believe Apple is mostly milking Mac OS users. Will it phase out serious PC development? Or will it eventually move its command-and-control methods up the value chain to the Mac? Apple says it's committed to the Mac's future. I'm not so sure, especially after Jobs, speaking at the Wall Street Journal's All Things Digital conference earlier this month, made it clear that he believes the iPhone/iPad ecosystem is the real future of personal computing, with PCs becoming a much smaller player."
I'd say that "slowing pace of Mac OS development" simply isn't true; if anything, I've felt like there is more development going on now that iOS is creating a large pool of Cocoa/ObjC developers.
And also, it's still not less than ideal. Nothing has changed wrt. MacOS's openness; in fact, Apple continues to promote new APIs that are cross vendor (OpenCL, for example) with new releases of MacOS.
Apple isn't going to one day magically turn off "unapproved" applications with no warning; it will be a gradual process if it ever happens. Indeed, one must see the writing on the wall, but it has to be written first.
He writes "As noted, I've been happy in the relatively free Mac world. But given the slowing pace of Mac OS development, there's reason to believe Apple is mostly milking Mac OS users. Will it phase out serious PC development? Or will it eventually move its command-and-control methods up the value chain to the Mac? Apple says it's committed to the Mac's future. I'm not so sure, especially after Jobs, speaking at the Wall Street Journal's All Things Digital conference earlier this month, made it clear that he believes the iPhone/iPad ecosystem is the real future of personal computing, with PCs becoming a much smaller player."