Perhaps it has dependencies on AROS features not available on 3.1?
In any event, it might prove too slow for any real m68k CPU.
OpenSSL, Curl, Fontconfig, ICU, SDL and of course MUI seem to be the main dependencies.
I'm not sure whether an 060 could handle the resources required, but PUP/WOS machines maybe? UAE/Amithlon machines obviously would have no speed issues.
Anyhow, i suppose the only way it would ever be seen would be if a developer needed that itch to be scratched and ported it.
http://sszymczy.rootnode.net/index.php?menu=projects&submenu=owb