Let's say I install a theme today and launch a site using the current WordPress 3.2. Can I use that theme indefinitely? In other words, when WordPress goes to version 3.3, or version 4, or version 10...will the theme always work? Will WordPress ever change core functionality so much so that a 1 or 2 or 3 or 7 year-old theme won't work?
I am considering switching a successful site from joomla to wp, and want to make sure that years down the road I won't update the version of WP and the whole site breaks.
Thanks for any info.