No. There are a few non-Busse blades I have bought fairly recently, for various reasons.
I bought a Dozier General Purpose Hunter because Busse has never made, that I am aware of, a traditional semi-skinner pattern, which is one of my favorites.
As I discussed in a recent thread, I bought a Ruana semi-skinner pattern for reasons of nostalgia solely because it greatly resembled one my dad once reground for me.
I also picked up a Arno Bernard Rhino at Blade '14 with a Nile crocodile handle material and had to have it. I am fighting off the urge to start a Bernard Nile crocodile collection.
Recently gave away a first-run Benchmade Nimravious I bought years ago because in the end I never could warm up to it, though.