Currently on my teams robot we have a 6 motor chassis. We wanted to be able to use the default arcade control on easy c, so we Y-cabled the motors together so that they all fit in 4 ports. This led us to think, does y-cabling the chassis motors lead to a decrease in power in the chassis?
This question has been asked and answered several times on this forum. A quick search of “y cable” turns up several results like this. Please ensure that you are not asking a redundant question whenever you post on these forums.