I'm a Mac user and over the years I have replaced the user-replaceable parts, mainly upgrading the (or in one case, replacing a failing) hard drive.
So I'm rather disappointed with the parts-soldered-on new Mac Mini (and the rather low processor/RAM specs for the base models, which will cost $$$ in BTO options to get to anything really usable, IMHO), which is a letdown after such a long time between updates. Maybe they'll have changed their minds on the issue by the time I actually get around to getting a new computer (probably not).
Anyway, I was actually going to comment about OS X Yosemite, which while it apparently has an improved iBooks app (with some kind of new advanced preferences ePub editing function I haven't tested out yet) and an enhanced selection of Text-To-Speech voices and languages, also looks unfortunately ugly. It's like all the interface was squashed flat under a steamroller set on a Day-Glo filter, and the Finder icon looks especially sad.
(Also, it no longer supports the drivers for my old graphics tablet, which was going to be the thing preventing me from switching until that got fixed or I could at least try porting my prefs over and I could use my custom settings for the stylus buttons again since it turns out I really, really dislike having to touch the trackpad for stuff.
But then my graphics tablet decided to moot that point by dying on me just this afternoon.
)