Here's your techie term for the day: Moore's Law. This law basically says that computer processing power doubles every two years.
The guy who said this, Gordon E. Moore, co-founded Intel. So you'd expect he knew what he was talking about.
And, in fact, he wrote down the law in 1965 and it hasn't run out of steam in the last 50 years. Of course, that still doesn't come close to matching Murphy's Law, but that's a different story.
All that is to say, it's not just your imagination that technology moves really, really fast. And it explains why you might collect a number of old computers, smartphones, tablets and other gadgets over the years.
The big question is what to do with these old gadgets. You could sell them - read this tip on how to do it safely. However, for older gear, it might not be worth your time or hassle.
Fortunately, you can still get some use out of old tech if you think a little creatively.