You say this, but the Pi 1 was released, what, nine years ago? And sales have apparently been good enough for them to also build the Pi 2, 3, 4, compute modules, Zero, and Zero W, as well as a standalone keyboard, and now a microcontroller. It's spawned an entire ecosystem of add-on boards, as well as other entire lines of SBCs built by other companies.

I really don't think you can drive nearly a decade of all that just from people buying one and tossing it in a desk drawer. I think maybe your perception of the Pi's popularity and real-world usage doesn't reflect reality.