Benefits of brand synergy

You will find hat most audiophiles mix components to achieve a sound they most enjoy. I don't think there is really any advantage to using the same brand of components. It drastically limits the choices you have. Manufacturers of course push brand symetry because it sells more product for them

I suppose if you really like the sound from 1 brand, and you like the physical look no reason not to go with one brand. Generally, there is no sonic benefit.

In practice individual brands will do some things better than others. For example their amps might be good, but their CD players not so much. Most people like to mix and match to take advantage of individual brand strengths. Synergy becomes more of an issue with speaker/amp matching - particularly as it relates to amp power/quality and speaker impedance/efficiency.

In general, who cares... Yes and No.
In particular if you like the sound of a specific brand why not.

"In practice individual brands will do some things better than others. For example their amps might be good, but their CD players not so much."

That's what I've noticed too, particularly from many budget manufacturer's. It led me to wonder if the whole is greater than the sum of it's parts. Thank you for your responses.