-The SN2010 retailed for about 10K (Euro/Dollars)
-It has never been truly available, as in: you could go somewhere, order it, and expect it to turn up in 2-3 days
-Even though small, these units tend to be loud, with at least 2 tiny fans making a lot of high-pitched noise
But the most salient point is that, even with "Linux on a router/switch", there's no guarantee that you'll get decent performance, as that entirely depends on how well the kernel understands the (proprietary) onboard chipset, which usually means that you're squarely in "well, here's this blob that works on certain kernel versions, and good luck with that!" territory.