Lutron Caseta - 3100sq foot townhouse 65ish devices
I setup caseta in my last two apartments (800-1000sq feet, 15-25 devices) and loved it. Honestly never had a single issue. We are moving to a townhouse and I want to continue with caseta. I like to KISS (keep it simple stupid) and not complicate integration. I will do lights, a smart lock, cameras, shades, thermostat all with their own ecosystem.
I know it supports up to 75 devices but should I expect any drop in quality as you get closer to that number. I put 65 in my subject but the number is less than that. I am just over estimating as I might add some shades, picos, etc. i cant imagine every going above 67ish.