Sirs, I'm cancelling my subscription
"Right now, you can go buy products that work and are cheap and don't need HomeKit."
And the security is non-existent.
"But that concern is being rapidly addressed by the market."
No it's not, that's why sites are being hosed off the Internet with 1Tb DDoSes. If Apple make security a feature of their HomeKit marketing, people will go for it. The vast majority of Internet o' Tat sold today would still take part in the next DDoS.