Whenever I buy smart-home stuff I first check if it is supported by HA. (So no more Kasa, and Nest was a huge compromise, I'm thinking there is a place for HA to make a [OpenTherm] Thermostat, like you made the P1 smartreader ["SlimmeLezer", reads energy and gas usage in the Netherlands]). The new Energy dashboard is extremely cool and useful and it's making a difference.
I love what you are doing and it's making Home Automation/IoT a better place. It is how Home Automation should be, with privacy and local control as founding principles. Keep it up.
Edit: Amber looks great! M.2 nice! I thought you were all about Odroid internally, so I'm a bit surprised it has a Pi compute module, I like that though. What drove that decision? Maybe you can go on the Self-Hosted podcast [0] again and talk about Amber, I enjoyed the previous interview [1] :)