there is no limit, other than what the code is set up to do. right now you can connect to the trilogy, plus 4 ansible, plus one JF-- which is 8 devices, which the bus board is clearly not designed for this sort of maximal setup.
cables can be daisy-chained, so the alternative option is a custom ribbon cable with multiple headers on the ribbon, like the original TT cable that ships. perhaps it’d be better to make one with lots of space in between each header.