Personal preference, but: 1. All-in one: a negative 2. Build quality: Apple's build quality has gone down in the past seven years. 3. Warranty: OK, you got m

Personal preference, but: 1. All-in one: a negative 2. Build quality: Apple's build quality has gone down in the past seven years. 3. Warranty: OK, you got me there. 4. MacOS: Of all the OSes I've used in my life, MacOS is certainly not the best. It's not a selling point. 5. Building & maintaining time: This is a positive. I enjoy being able to know exactly what's in my machines and having the ability to replace any part I want whenever I want. There are other upsides to building your own versus buying a Mac. 1. Complete control over aesthetics. 2. Broader choice of OS. 3. Broader hardware options. If someone gave me a free iMac Pro, I would sell it and use the money to build something I like. Again, please note, this is personal preference and not intended to be a judgment on those whose preferences differ from mine.