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...the consumers may be better cash cows than demanding prosumers, but it's the tech savvy people and their stance that accounts for a lot of buying choices arround them.
If my Mac Pro starts to die and no more PC parts can keep it alive perhaps switch to windows unless FCP is smoking on the iMacs. Trying to move to Premiere already so why not move back to Windows as well? I don't care really, whatever works.
Why would Apple abandon the Mac Pro line? They won't unless it no longer is making a profit for them.
Seriously? When is a 12-Core Mac Pro with 64GB of RAM going obsolete? That machine could last you ten years if you take care of it and still have enough juice to get through anything you throw at it, even if we are running Mac OS 12 by then.
Until Apple completely drops support for EFI64 you are still OK with that machine.
Id be careful - a decade ago it seemed like a G4/450 with 1GB RAM would last that long, and fair enough, with some hacks it can run 10.5.8, but its far from a pleasant experience (This is based on my personal G4/450/1GB with upgrades that isnt a brilliant 10.5 performer).
My G4 Sawtooth which I purchased in 2000 lasted me until 2006 when I purchased a Mac Pro 2.66GHz (6 years), given, I had to upgrade the processor to a 1GHz G4 and I had 1.25GB of RAM installed, and upgraded the hard drive to a 20GB drive.
So ten year may be stretching it. You could still use a G4 even today with 10.5.8 and still be able to surf the web and run Photoshop and iTunes, you see....but the Intel Macs all basically made the G4s obsolete, and the G5s are pretty obsolete by now too, and they are almost ten years old. A five-year-old Intel Mac is not obsolete now, but Apple will eventually drop support for anything but EFI64 and then it will only be Core2Duo or better that will be supported anymore. We are then talking 2007 or later (4 years old or newer)
It might be 2017 or 2018 before some new EFI standard comes around, EFI128, and then all support for EFI64 Macs will eventually be dropped. But we are now speaking Post-Ivy Bridge Haswell and Rockwell processors here...that is probably at least 5 or 6 years off.
If Apple discontinued the only true "Pro" product remaining, they would be severely chastised by the entire Mac community. They would get terrible emails, a bad reputation on forum sites, etc...