Ahhh!!!
That explains much!

I came to Apple from PC in 2003 when my PC failed at ate all the files on my hard drive. But I've always used a Mac in some capacity (school or work) since the mid 90s.
I have ONE Intel Mac. A 2006 MBP, 32-bit Core Solo. So, it's limited to Snow Leopard (although I know people who could help me get around that).
Totally get where you're coming from then. You're going to find that MOST of the software and hardware that we use is old and out of date. The trick is making this stuff work today without driving yourself insane.
I had been a PC since about '85 starting with DOS and floppy-disks without hard drive. Then Win3.1 and my first mobile device had been an HP Omnibook. After a period of Win98SE the WinXPpro/PalmOS experience had been great with an Acer Travelmate800, which is still on duty with an mSATA and Win7pro. Then PalmOS kicked the bucket and WinMobile had been a big disappointment and was already dead on my arrival.
In 2009 my first Mac had been a mid 2009 intel MacBookPro 13" 2.53GHz Core2Duo with Leopard.
The switch to that MacBook had been so smart and smooth and instead of dealing with problems the experience had been the more about discover the new options. Same with the switch from WinMo to iOS -especially when it comes to cloud, networking and remote access and the different way of wireless connection between devices instead of being strictly hooked locally.
I've got my first PPC after my brandnew MacBookAir 11" had been stolen. Looking back, that change had been a gain more than a loss now...
Leopard in 2009 had been great and it also feels great now on my PPC machines now and after my "iFiles"-App experience on latest iOS these old machines are fully linked to the cloud again. On the go any G4 Book connects to the mobile Wifi-hotspot of my iOS device and has 3G internet. With iFiles I can get an APF connection to the G4Book and move files from camera roll, Dropbox*, GoogleDrive, OneDrive*, Box, webDAV (box, GMX,T-Online)*, Evernote (*can also accessed directly from the Book without using the browser).
On a training course I can also use iFiles to take pictures which are directly stored within any folder of the G4Book, so they can be directly added into any notes I writing about the lectures. Notes can be done with Office'04/'08, DEVONthink, SOHOnotes etc. which are reconnected to the iOS-device again. Any DigitalCamera can be used for taking pictures too if been connected via USB or Firewire.
So I wouldn't talk about "out of date" if I consider my iOS-device as a kind of "Modem" to connect to latest options.
I think, it's more about lacking speed and performance, when it comes to heavy tasks like batch scanning, batch-OCR, viewing/editing high-res video, and faster browsing. For that purpose I solely use an intel-machine. Rest can be done with the PPC easily and nearly without any fear of viruses.
Currently nearly each of my PPC is integrated into the workflow of my home(mac)- and office(win)-network. So if you add the option of a cloud connected intel-Mac as a file-server in the local network, the options of the PPC is also without limits, when it comes to the cloud.