[Perfectlap]

roadsters are bad for long term car sales.

They may be hot for a while, the "gotta have it" item but that wears off eventually.

The big problem even in a strong economy, which obviously this is not, is that the car has only two seats. That's a lot of moolah to go fun seeking while leaving junior with the baby sitter or your girlfriend's little sister at home.
People need more practicality from their luxury purchases. So instead they buy a "luxury SUV" (Cayenne) or a Luxury coupe (Carrera). You can jam some baby seats in those all day long, which is what your average middle aged wife is going to demand from hubby before raiding the piggy bank.

The problem for the Boxster is that it's too much of a real sports car. It's simply much easier for a car company to hack the roof off a coupe and satisfy the "doesn it come in a convertible" crowd. Purists are too few and their choices too many.