There has been mention of Sadowsky and Lull in this discussion which are probably the two best Fender based small builders (that I have owned) and I agree with previous comments, they make a better instrument overall, no question. Again just my two cents.
However, I have settled on an 18mm bridge spacing, 1.81 nut width, C shape neck profile (not asymmetric) and 34" scale as my primary spec for a 5 string jazz bass.
Sadowsky doesn't make this instrument standard.
Lull = special order.
The reason I have been building basses using Warmoth parts is because I can get a quality instrument for under $1200, that match the above criteria.
Fender = standard issue and they are readily available.
Brand New American made in Corona California bass shipped to me courtesy of Guitar Center, with price match, $1300.
Sadowskys and Lull start at $2600 and go to $3200 before tax. As it should be. These are hand made basses for the most part.
To me, I have concluded that Fender stays on the map because they remain viable and have been listening and making some upgrades that have been badly needed for awhile.
I think Fender is; the working mans bass.