Reliability is a big question here. I don't want to deal with replacing failures, and the risk of fire can be high (a lot of these chinese electronics don't use adequate gague wires or have legible datasheets to even be able to plan current draw).

And even with all that, I'm just not sure that a fully-automated home provides enough benefit to be worth the headache for the majority of folks. I'm in the top 1% of income, I set up my own system and it's nice; but even I don't think it's worth what I paid for it.