well, I wouldn't call it evangelizing...
Fortner has a very specific problem with a certain concept of system design.
And since it's not about the latest and greatest Macs (and their respective OS), but about the workhorses of the G4 generation running a 'classic' OS there is in fact a difference.
Those machines don't have configuration problems because there isn't anything to configure.
They have a fairly effective hardware architecture providing much more power than the clockrate suggests.
But the main point is the lack of a registry in MacOS-9.
Important stuff for 'system' use is put in a special folder and preloaded when booting.
That's all - you stay in control.
If something goes wrong, just move that stuff from the folder and reboot.
A program installation is nothing more than dragging a folder to a harddisk on a Mac. There's no registry...
The install of a new OS doesn't need any applications to be reinstalled.
You could copy a running MacOS-9 to a different HD and boot another machine from this disk...
That's about the (simplyfied) concept of the 'pure' MacOS - but when suppliers from the so-called 'PC-market' discovered the Mac they did bring a good deal of their usual style of doing things - and messing them up

Like filename specific programming, overuse of the system folder, installers (!), etc.
Creamware itself is a good example of bad programming style and they are in good company with Oracle and M$soft and most Scanner/Printer suppliers...
Most problems (or annoyances) with Mac applications have their source somewhere in this domain, but basic hardware and software configuration (as requested in this thread)simply lacks the typical problems of the WinTel world.
Btw I refer to machines up to the 'Quicksilver' series, afaik built pre 2002 and capable of booting MacOS-9.
Of course this has changed significantly since Apple jumped the UX train, but that's another topic.
cheers, Tom