Whether this is correct or not, I don’t know, but I was told that if you plug everything into a conditioner, you run the risk of not having enough power for a loud or dynamic passage. The same idea for using a larger gauge power cord.
I have an Audience 15 amp, AR-6 power conditioner. Currently I’m running a digital setup. Streamer, DAC and a Hegel H390 integrated and I really can’t hear any difference at all. The AR-6 has a good electromagnetic breaker in it, so I feel safer with the Hegel plugged into it, instead of the wall.