Over the last week I've removed a pro control setup that barley worked and a URC system. Replaced both with C4.
Each system now actually works and does much more
Also helped remove an X10 lighting system and a diy setup for a C4 upgrade that now gives real time feedback and actual zoned music. The husband and wife not only love it, but plan on actually listening to music again since it's actually easy now and not a switcher box puzzle anymore