Most computers here are not used daily. Some are not even connected to the web.
Some not even connected to a net at all.
I got two (identical) hand-me-down "smart" phones (w/o a phone hookup). I tried them for a day, but found the small screens, my large fingers/thumbs and the limited capability mobile app/interfaces to be sub optimal to a desktop setup (old laptop running a external monitor and keyboard). The smart phones do have some advantages (Ski Tracker).
I am fastidious about updating and security, although I don’t know the technical details of it all, I have been like that during all my years of computing and it keeps me trouble free.
Here are some ways to harden your XP if you choose to.
Here are some links for “hardening” XP.
http://www.microsoft.com/en-us/download/details.aspx?id=41138
http://www.thewindowsclub.com/secure-windows-xp-after-end-of-support-april-2014
http://windowssecrets.com/top-story/securing-xp-pcs-after-microsoft-drops-support/
http://www.foxguardsolutions.com/resources/details/xp-mitigation-techniques