I have inherited a site that includes JomSocial. For a variety of reasons, I am very seriously considering changing to Community Builder.
My question is, after uninstalling JomSocial and (I hope) all of its constituent parts, are there any known artifacts left over that will interfere with the installation and operation of CB, such as database structure, hidden plugins, modules, or other beasties lurking in the bushes?
Honestly I do not really know.
But even if I did, your safest approach would be to backup first - even restore to test environment (see Akeeba) and perform all tests there - then replicate on live site.
nant