I have four Home Assistants pinned in the browser on my laptop. I look after several more.
Thanks for the heads up about Digital Alchemy, now I have to go and evaluate it 8)
I already have upgrades to my 3D printer sat waiting, and a massive stack of software to go through for work and home.
I've just finished replacing all the door handles in my home (long story) and the flush button on the down stair bog. It turns out that most of my home lighting has a spare conductor available or I can use a dimmer instead, so smart lighting is indicated at the switch. One lot done, more to do.
All of my smart IoT stuff must be locally administrated and have a manual option if the network is unavailable, if possible and work as well as a non smart effort with regards power. So my doorbell is a Reolink job on the THINGS VLAN with no access to the internet. It is PoE powered and the switch is powered by a UPS. You get the idea.
I run my home IoT smart stuff with the same rigor as I do at work. I'm an IT consultant these days but I did study Civ Eng at college.
HA allows for plenty of solid engineering for engineers. You can do it all in the GUI with decent integrations as a "newbie" with confidence that you won't go too far wrong. You've also got a really solid Zwave stack aside a well integrated MQTT stack - how much more do you want?
Theres also a Zigbee stack too, which is ideal for cheap stuff. My Lidl smart switches work really well at quite a long range.
I could go on at length ... 8)
How much more engineer do you need?