I used to be a bit of a compulsive upgrader, chasing the latest and greatest.
However, in a complete about-face, my Late 2015 27" iMac has been humming along nicely despite it having clocked a ton of hours over the last 6 whatever years of owning it -- the original Magic Keyboard keys are incredibly worn out as is the screen as of late. It's suffering from serious image retention throughout an approximate 2" wide perimeter and it has the infamous "smudges" at the bottom left and right corners.
But I hung on to it as I heard rumors about Apple developing their own silicon, right around the time I would've normally had upgraded this Mac. I instead decided to just wait and see this time around for a bit longer. And the rumors came and went. And I kept waiting. And waiting. Finally, WWDC 2020 came around and I realized I'd have to wait a tiny bit longer. Now that wait is finally coming to a close in another week or two ?
I hope to get 10 years or more of heavy use out of this pair of Studio Displays and Mac Studio. I am even hoping for the same duration with my iPhone 13 mini this go around, having recently upgraded from an iPhone 7.
I guess we'll see how the M series architecture grows and matures, though.