I currently own two disc brake bikes (a fatbike and XC) and I have really tried hard to like them. I just don't. I think they are fickle to set up, they groan or squeal with the slightest of contamination on the discs and are a pain to bleed. I don't have any room in my life for them on my road bikes. I'll keep my rim brakes indefinitely even if that means I'm only buying old bikes (like I don't already anyway).
My 2003 Litespeed Classic...