Then I got generic Chinese IR blasters, and use homebridge to connect it all over the LAN to Apple HomeKit.
If there is a shift in tech, someone will always be selling new IR blasters due to the installed base. Worse case, I'll always have the IR remote controls (or can build something out of an raspberry pi/arduino)
The IR blaster I use is a Broadlink RM Mini, it's cheap, has been reverse-engineered, and after you've set it it's happy running it on an "IoT" VLAN with no internet access.
It was using the same IR frequency as one of the buttons on the TV remote :)
Currently using a tinkerboard, but would probably be looking to virtualise this
>"smart" tech yet
Smartplugs and smart lightbulbs are pretty easy. Things start getting a bit ugly on presence detection though - i.e. who is home and where. Haven't seen anything reliable on that front. The other headache to think about is standby mode. Many things these days can't be controlled via smartplugs because they go into standby mode...not on mode
1) If you're considering a device...google the device name & github. Generally if I can find some github code of someone managed to get this to talk to python then we're probably OK to buy
2) The Xiaomi equivalent (Yeelight) of Philips Hue Lights are really good quality/value for money. If you can swallow the associated question marks on brand I'd go that route.
3) Basically everything is gonna require an app on phone initially and it will phone home...so you'll need a FW to block this after you got it to talk to local home assistant server
4) Some of these things like zigbee...frequency depends on country so look carefully what you're buying.
5) Most of this tech doesn't like 5ghz