Maybe it's reliable for you, however why has no one built a professional installer service on the platform?
The result of a professional delivery of a HA-solution would not be the product "HA", but the custom solution that was built on top of it.
Once deployed, the solution cannot follow the maintenance cycle of the HA-backend without risking to break the frontend experience of your customer, which means unpredictable work-hours to maintain the solution (get stuff to work again, rebuilding broken functionality using new methods, etc.)
To use it professionally, one of the biggest needs would be that the frontend versioning is decoupled from the backend, so a professional could deploy your custom solution based on HA version A with frontend version A, and regardless how often HA is upgraded to version B, C, D, X, the frontend will still be version A until it is manually migrated (possibly as a paid maintenance service).
But what this means is, that alot of development effort would need to be put into backwards-compatibility to older frontends and testing of all the permutations whenever a new release of the backend is done.
The (reasonable) decision of the community is to not do that, and instead put the energy into evolving HA as a whole.
But yeah, I wouldn't want to deploy this professionally and be in fear every time a new version is released...
I have been using HA since early days. If i have to pay someone to build it, i would be very poor. The amount of time and effort put into it, it’s insane. And environment changes regularly.
So i think there is no professional service because of the high complexity and the customers don't have much budget for this.
It is possible to assemble very specific setup of hardware and configuration that could work out of the box. Kinda like a HA distribution that has been tested rigorously against a predefined set of supported hardware systems.
The ecosystem is so fragmented between cheap race-to-the-bottom gadgets and the more expensive "works only with OUR app" that integrating anything more than just a few bulbs is a pain.
And that's not even considering the amount of customer support that someone doing this professionally would have to provide.
In my case: local A/C installers are reselling Haier aircons. Good hardware. Shit software (see "tale of the two apps" elsewhere in this thread). Or, a nice local company selling floor heating solutions. Got electric floor heating from them. Control panels have "smart home integration". Guess who made that? Tuya. The world's finest seller of white-label "smart" devices. Complete with a shit app.
Home Assistant is the only thing that makes the two device classes more convenient remotely than through an IR remote or using the wired-in control panels.
