That's somewhat untrue. Personal software only moves to your constraints. Shared software moves to others' as well. I use Mediawiki for my site (I would like ot

That's somewhat untrue. Personal software only moves to your constraints. Shared software moves to others' as well. I use Mediawiki for my site (I would like others to be able to edit it) and version changes introduce changes in more than the sections I care about.