5. It's a jungle up there
So now we have no shipped preferentially treated extensions and we lack some way of distributing these. We already have TER and it works wonderfully (but could use a performance checkup). But what TER doesn't have is an official way to indicate that an extension is worth while; a favourite of the community proven to add value. Twitter has the "verified" badge, Apple's App store has the "Featured Apps". TER has a download count and graph which by the way lacks a time scale.
Why don't we introduce a "recommended" and/or "official" flag on TER? Allow such extensions to be listed specially. Raise them as top priority for suggestions. Ship the core extensions from our Swiss army knife as "official" extensions. And let the community decide which ones will get that distinction; not some arbitrary number hits from an Apache log (sincerely, no offence! I realise exactly why the solution is the way it is and I respect it! I only wish to make it better).
There's another perspective here.