The Core

>Dot (v2)

We have 8 or 9 scattered about.  The original intent was to have a cheap, whole-house intercom system.  In reality, we seldom use that feature.  Later, I installed the Hubitat and integrated it with Alexa to provide Louise with easy, quick, & non-tech lighting control for security.  Of all the options, voice control requires the least user know-how.  She likes it and uses it for routine stuff like "turn on the TV".  For her, this wasn't much of a stretch from setting timers, reminders, and grocery lists.  When I tossed the G Minis and installed Sonos in their stead, again it wasn't much of a stretch for her to control those, too.

When I got into smarthome stuff it was to replace a couple of hard-wired timeclock circuits (water heater timer) with an easier to manage UI.  Then maybe add a few light switches for security & convenience.  It's gone a bit beyond that;

Curbside mailbox announcer ^{(200 ft from house)}
Magnetic field vehicle announcer ^{(100 ft from house)}
Garage door opener voice or phone control ^{(overrides existing standard manufacturer controls)}
Schedule and launch 2 old Roomba 520s via IR
Repeat reminders via TTS ^{(managing repeat reminders on ALexa is a PITA)}

<update>

Hubitat's capabilities are growing at an exponential rate.  It is both gratifying and scary to observe it develop and put hundreds of assorted devices under its control --many of which were never intended to be controlled by a 3rd party hub.

If it ever has an IPO, buy!

>package manager

I only use a few 3rd-party apps, mostly from @bptworld and several are now unsupported as his apps evolved.  I have not installed the very popular PM because (while I cannot write drivers I can read them enough to modify them, some extensively) I'm afraid I might inadvertently overwrite my customizations.

>been working well for a few years now, and needed tidying

Yeah, my old C4 was purring along just fine until the lightning fried it a couple of months ago. Now on a C7 and also did quite a bit of tidying while installing it.

Hubitat is a winner. The danger is that it works so well that you can forget how to do stuff, **particularly** if you are zigbee-only.

<added>
I'm still using Rule Machine 4.1, though.

>more groups and scenes

zero scenes.

All my groups are lighting and are defined in Alexa for voice control, not Hubitat.  We only have about 6 groups that we use --common stuff like "all downstairs lights" and "kitchen lights", etc.