Sure, but not many have gobs of documentation, regularly updated OS distros, and a rabid community of coders, makers, educators, etc. That Raspi B you bought five years ago is still supported by the latest Raspbian releases. Not many other boards will have that kind of long-term support.

Until there's a (well adopted) common platform standard for these ARM-based boards, the Raspberry Pi Foundation must continue to develop their hardware. Unless... perhaps Eben and Co could work on that standard, and its adoption, as part of their goals.