The announcement has explained it:
“The purpose of this is to make a fully consistent firmware for OS, OSPi and OSBo. The program is written in C++, so it’s not as modification-friendly compared to Dan’s Python-based interval_program. Also, there is no plugin architecture currently. However, as I said, the primary goal of this is to make OSPi and OSBo’s firmware maximally compatible with OS, so that any new features introduced in OS will also be simultaneously available to OSPi and OSBo.”