Shelf life on my prior PCs was generally around 3 years before they started to really struggle with newer software. I'm in year 4 with my current Mac, and having no signs of a problem yet.
You're paying for better build quality, better customer service, and fewer bugs in the OS. User interface is a personal preference, but I think that Mac's is superior once you get used to it.
lets not get crazy here with "fewer bugs" in the OS and all that jazz. Macs are fine. Especially for kids and students and adults who dont want to know how to actually compute and do simple stuff like browsing the web and online shopping and App and photo usage. I choose to use an IPhone over Samsung for the same reasons. I dont want to be bothered. But Microsoft Office for Mac is a disaster waiting to happen, and Macs have their own set of absolute un-user friendly BS to combat that I could list for hours. I will list one from just yesterday to illustrate:
My shared printer IP's were changed to a new Network subnet. On my PC's? No problem, Go to printer properties on the printer driver, type in the new IP address, and boom , done.
on my Macs?
Lets see, I went to the installed drivers and thought I could do there. Like a PC. Nope.
I had to go through an antiquated crappy clunky web browser cups interface that makes no sense and no intuitive at all. But could I even do that easily? NO! It was disabled!
So I had to open the terminal window, figure out the command to type to enable it (>cupsctl WebInterface=yes).
And only then could I figure and reach that crappy interface via browser (
http://localhost:631)
Even then, try to make sense of the proper tabs to navigate under cups even after all the hoops you jumped through to get there.
Macs ARE NOT better than PC's. PC's are not better than Mac's. They both have their absolute mind numbing BS you'll be faced with at times. It just depends what your usages are.