Old browsers and computers
I run two websites, six blogs and do all my record-keeping on this ancient relic. It's only broken down once and cost me an entire $142.00 to repair. It's been one of the best investments I've ever made and one of the most reliable products - like most things from Apple - I've ever owned.
The trouble is that the processing speed is not what it could be and there are some web sites that simply don't respond well to my Mozilla 7.6 or IE 5.3 browsers. It's time for an upgrade, though, as I cannot upgrade Flash or some other products, but what's really going to cost me are all the programs that I will have to purchase new.
Technology. Love it AND loathe it.