[nkoren]

It's easy to miss. On the front page, the word "store" only occurs once, buried three page-scrolls down in the body text. Otherwise it very much gives the impression of being some kind of analytics dashboard for third-party datastores. And I didn't notice that until after I've visited the website, clicked through a few links trying to figure out what the fuss was about, then gave up and decided to read the comments here.

[Argorak]

Probably because some store features have been missing up to 1.0, like backup/restore without knowing database internals. (yes, rsync did the job, but only because you knew the list of guarantees that makes it possible).

Also, Lucene at its core is an Index. Changing the query strategy might require reindexing. It is perfectly valid to throw data at it, build the index and throw away the source. You will just never get it back again.

While ES can be used and tuned as a store just fine, it is not necessarily its raison d'etre.