ncompatibility with older software and data (even their own)
Here's something to chew on with that:
A G5 Quad could-at the time of its introduction-run every single piece of Macintosh software ever written from 1984 on up to 2006 out of the box. Of course, getting the software ONTO the Quad isn't always the easiest thing, but once there it will run(as long as you are running Tiger, which was the shipping OS).
The first Intel Macs cut off everything that was not OS X compatible, which takes you back to roughly the year 2000(give or take a few years for some companies). That was 16 years of software gone in one fell swoop.
Then, OS X Lion made another cut and got rid of everything that was not either Intel-only or a universal binary. That pushed the cut off up to roughly 2005 or 2006 depending on how quickly the software companies transitioned to UBs.
Granted, things are "stable" now and we have built back up a software library of about 11 years. Apple has also been kind enough to keep system requirements the same for the past four OSs, although I'm not crazy about the new 1-year update cycle. I have computers(several) running El Capitan, but my main Macbook Pro and my Mac Pro are both still running Mavericks.
In a way it is like a classic car. On paper even a reasonably priced modern car is faster, safer, more comfortable, reliable, and efficient. But there's something special about driving that old Alfa. I don't want to trade my modern car for it, but I still love the old one and want to take it out for a spin when I'm in the mood
I feel much the same way about my MG. Quirks and all, on a sunny day it's a lot of fun to take out on a twisty road and drive it like it was meant to be driven. That's true even if I have to stop and file the points or top up the oil
I even enjoy driving it to work, but then when I get stuck in traffic I start to get irritated by the amount of heat pouring onto my feet from the poor(i.e. not existent) insulation in the footwell and around the transmission tunnel, the number of times my left leg has to step on the clutch, the times I have to "blip" the throttle to keep the engine from dying, constantly watching the temperature gauge to make sure it's not going to overheat, and then hoping I don't get rained on
. On days like that, I'm happy to be in a modern car where I can stay a comfortable temperature and know that the car is just going to keep going along like I want it to.
Similarly, I love sitting in front of a PPC Mac and running software it was meant to run or playing games it was meant to play(include a lot that I grew up with). I even get some real work done on several of my PPC computers, particularly my Quicksilver.
But, at the end of the day, the Macbook Pro is what I'm usually using, including now as I type this post.