A while back, while browsing this forum and ‘surfing’ whatever links were included, I ended up on a page that had multiple links to presentations that ‘explain’ the raison-d’etre of openHAB. It was, if I recall correctly, a collection of presentations given at some conference on HA (maybe in Berlin?). I must have bookmarked such page from a different computer and can’t find it today.
Anyone can point to such page. Sorry, not too detailed of a description.