There is yet another Banana Pi, the
Banana Pi K210. What sets it apart from its cousins is the instruction set of the Kendryte K210 SOC:
RISC-V instead of ARM. BOINC-wise this would mean at the moment that you will have to compile your own BOINC client/manager and the same holds true for all applications.
As yet the dual-core 400 MHz Kendryte K210 will not make much of an impression -the main target market is the IoT and STEAM education market, but it is already a 64-bit design and carries no legacy problems with it.
In the future we can expect more -and more powerful- RISC-V designs. Even the Raspberry organisation is looking into it.
Just in case: a 64-bit RISC-V boinc-client running under openSUSE:RISC-V:
https://rpmfind.net/linux/RPM/opensuse/ ... scv64.html