Over time support for 32-bit components Gramps uses is dwindling. See this related thread: MSYS2 no longer supporting 32-bit bulids.. @prculley has a way to build the 32-bit components, but with the 64-bit build being fully scripted recently, I wonder about the time needed to keep the 32-bit builds on par with the 64-bit ones.
Statistics on installs of the 32-bit AIO would be helpful in determining cost-benefit.