Recently was browsing this forum looking for information on a 'tool' (don't recall which) and chanced upon an 'aside(?)' between experienced users. It seems that the first 'speaker' was answering a query, probably from a 'newbie' like myself concerning the 'proper' use of a command, or a 'workaround.' Anyway, the second speaker 'chimed in' with something like, "Yes, that happens because DCAD doesn't use the "________ engine." " To which someone else(?) responded with something like, "And that's the reason that DCAD can be sold so cheaply.
If the above is reasonably accurate, then this mysterious, 'all-powerful' engine would seem a likely subject of broad general interest for discussion.