Bought an iMac in '09, an iPhone 4 when it came out, an iPad 3rd gen, iPad Mini, and now an iPhone 5s.
Prior to that I was a PC user. I had to buy a new laptop about two years ago, you guessed it, because the one before that crapped out. Logging into work is the primary thing I use the laptop for, 3-4 times (~20-25 hours) per week, and occasionally (3-4 hours/week) I'll use it to log into pregame and various site surfing (not porn). I run Kaspersky anit-virus on it. It runs so shitty already that I'm probably going to have to buy another one in the next 6 months.
Meanwhile, the iMac is a freaking work horse, screaming along. I use it to do all of my number crunching. The iPhone 4 and iPad Mini lag a little since the iOS7 update but aside from that I've had no issues. I had already planned on upgrading from the 4->5s, otherwise the iOS7 lag would have been pretty annoying but it's not as noticeable on the iPad Mini. Anything that isn't compatible on the iPhone/iPad I probably don't need anyway, not enough to warrant replacing my device/system every 20 months!