It’s not really built to run on the controller as much as it is to run with it. My goal is make a Raspberry Pi an acceptable platform for a modest-sized system. The latest model is quite robust. A lot of HA users seem to also use home or small-office NAS systems, and most of those systems support docker containers (as does RPi), which makes an easy, trouble-free install without a lot of admin know-how. So those are my initial target user groups. The folks using Linux VMs or dedicated hardware will have it easy, as they’ll be able to choose docker or an install archive.
That said, I do have a successful build environment for the version of OpenWrt currently underpinning the Vera firmware, so it remains for me to test if I can get a version of nodejs up and running there. If that’s the case, it could be installed side-by-side with the Vera firmware. Another similar option for later consideration (at/after Vera EOL) is to build a stock-but-current OpenWrt image for the Vera hardware, so that you’d be able to extend the life of that hardware.
Of course, at the moment I have more options in front of me than time/hands, and most importantly, I’m going to let the community guide my priorities. Right now, it’s all about fit-and-finish for this first version. I can’t learn anything until somebody other than me uses it.