For those stumbling in here down the road, the current consensus is that FreePBX is the better option for your new PBX. Elastix 4 did release, but is not being updated enough to remain a contender at this point.
Yes, the number of people who are out there looking for "whatever is called Elastix" is way more than enough to keep the website and brand name around. Elastix has a huge presence in South America and in LATAM countries in general alone.