I decided to upgrade from MT 5.0.4 to MT 5.2.2. Why? Just for the hell of it. I've been home sick for a week with a bad chest/head cold that complicated my asthma. The upgrade would have been more smooth if I hadn't updated the templates in a fit of confusion and lost all custom templates and widgets I'd created. Fun stuff.
A full rebuild of MT on Friday took hours and hours and hours. Unreasonable. I've thought again about converting to WordPress but just can't bring myself to go through the conversion.