I am still using a SandyBridge core i7 laptop from 2011, and my only real gripe with it is its comically large bezel around the monitor by today's standards. I can't game with it, but general usage and development is not an issue.

I knew I was getting a big architectural jump when I bought the Sandybridge, but I wouldn't have believed you if you told me that in ten years I would still be happy with its performance and still using it.