Old guy here. I can remember fighting with and complaining about horizontal scroll bars on wide html pages. I didn't realize how good I had it. Now I fight with browser based UI's that rearrange themselves to fit in whatever width the browser is set to. Sounds good. Oh, that nav-bar on the left side doesn't fit? No problem. Now it appears as a set of sub-tabs arranged horizontally. The app knows where things are, but I don't. No thanks.

Don't get me started on links that aren't underlined blue font and only reveal themselves on mouse-over.