Are there any alternatives?

There are plenty. The Pi 4 Model B is the most powerful of the lot, but there are reams of other options. If you don’t need all that power, you can always buy first, second, or third-generation Raspberry Pis. Or there’s the Pi Zero, which is super barebones, but just $5. Outside of the Pi Foundation, there’s also the BBC micro:bit, a single board system produced by the company behind the original BBC Micro, or the Onion Omega2Plus, which is smaller than just about anything else out there.

　　

How long will it last?

Years, if you treat it right. The Pi 4 will undoubtedly be replaced by a more capable version in years to come, but unless you’re pushing the boundaries of what’s capable on a mini-PC, you don’t need much more than this. The Pi 4 Model B is already a somewhat capable desktop replacement and can handle any project you throw at it. Improving its cooling will help prolong the life of its components, though.

　　

Should you buy it?

If you’re looking for a homebrew computing project, this Raspberry Pi 4 is a great buy. It’s also a decent desktop replacement akin to the Mac Mini, only far smaller and far less expensive. It takes some effort to get things working as you want them, but then that’s half the fun of it.

　　If you know what you’re doing already, just buy a standalone Pi, but if you want a little hand holding while you get to grips with your new mini-PC, the Desktop kit is a great place to start.