To me the decision is also dependent on what sources you have in your system, and if they are providing balanced connections or not.
For example my Moon 310 LP phono stage provides 6db more s/n ratio using a balanced connection to the preamp than if I use a single-ended connection.
To me, that is significant given that it’s upstream (close to my turntable source), so it made all sense in the world for me to use a balanced XLR connection, and then it felt natural go for the same between the preamp to the amp (and from the streamer/DAC to the preamp).
Also, with separates and a large number of power cables that by necessity- at least in my case - runs from each separate and it essentially practically impossible to keep away from the interconnects, balanced interconnects feels like the right way to go.
For me, that is.