Re: BuddyPress and Shared Hosting
There is more overhead with WPMU, but the biggest issue is whether a site allows its members the option to create blogs and how many active blogs the site has. So, running single-version WP could help reduce the load in theory.
But, BuddyPress can also be a bandwidth, memory, and harddrive-space intensive plugin suite. It all depends on a site’s user activity and what additional BP-dependent plugins a site installs and activates.
For instance, if a site uses a media plugin that allows users to upload photos, mp3, and video files, then a low-powered hosting account could get swamped even if it is “just” running single-version WP.
