This is the real challenge RIM faces -- in an ecosystem-based market people's buying decisions are driven as much by the health of the overall ecosystem as by the merits of an individual product within it. So when it becomes conventional wisdom that your ecosystem is unhealthy, you enter a death spiral: people won't buy your products because the ecosystem is unhealthy, but the only way to improve the health of the ecosystem is to get people to start buying your products again. It's brutal.
The only way out of it is to come up with a product that nails absolutely everything: great hardware, great software, great third-party support, great price. I'm not sure anyone's ever managed to pull that off, though. Palm tried with their webOS devices, but while the software on those was excellent and the price was reasonable, the hardware was abysmal and the third-party support anemic. So they weren't enough to pull Palm out of the death spiral.