i suppose a lot of this depends on your specific expectation of the rack(s). i also use an external mixer for parts of my rack, as well as external gear. But if i pop on to a modular meetup, I want to take a small case with a dedicated small hp output for simple plug'n'play duties. This is both the blessing and curse of modular; the permutations of modules are endless so it's worth having a plan of how you plan to use it.