It's fiddly and there's a small chance you'll break some expensive components. (I once dropped a CPU from a height of a few inches, and had to straighten out th

It's fiddly and there's a small chance you'll break some expensive components. (I once dropped a CPU from a height of a few inches, and had to straighten out the pins with a credit card). Cable routing is a pain. I'd still do it if I had to, but prefer to order from a place that'll do a build. https://www.centralcomputer.com/custom-systems.html https://www.centralcomputer.com/custom-systems.html is local to me, there's probably something in your area. If you're picking an entirely novel combination of components, there's a higher chance of a compatibility problem. My 2018 machine browned out a lot until I tweaked some PCI-E power management thing in the motherboard's BIOS. There's some benefit in buying a bunch of parts that 100s of people are already using together. If Youtube videos of building machines seem interesting and fun to you, go for it.