Honest question: when was the last time you used Linux or Ubuntu? I haven't seen an X11 issue in years. Your argument still has merit, I've been burned on misconfigured packages in the past. But for everyday use (browser, text/image editing, chat, docs, etc) these problems simply don't exist. The network, print, display, and audio drivers have gotten very good if not on-par with Windows.
About a year ago I switched back. Ubuntu doesn't really feel like it's providing me anything Windows cannot, and Arch tends to go down burning when it is most needed to be reliable.
My biggest problem was multiple monitors. The setup was, and still is, an absolute pain to get working properly with difference screen size and dynamic docking/undocking of a laptop.
