@thelinuxEXP I think that your opinion on the self-hosted solutions didn't consider some self-hosted FOSS alternatives to HomeAssistant.
I like HA for many of its design choices, but I agree with you that it's increasingly becoming a hub to connect different clouds rather than a truly self-hosted solution. It creates the illusion of privacy, when actually it just introduces one local layer of indirection, and your data still freely moves among proprietary clouds.
But HA is not the only available self-hosted option. OpenHAB has been around for a long time too and, being more "scriptable" than HA, it makes it easier to run truly self-hosted solutions - with a bit of tinkering.
And of course I'm a bit biased here being the main developer of Platypush, but your video convinced me even more that I'm going in the right direction. I started Platypush also with the idea of building a hub for clouds (initially I mainly wanted to connect Google Assistant, Hue lights and Spotify controls), but over time I reduced the integrations with larger clouds to focus instead on open-source (and completely self-hosted) alternatives.
This means more focus and support for the NextCloud integration over Dropbox/GDrive.
mopidy/mpd/Snapcast over Spotify Connect.
Native mplayer/vlc/Kodi integrations over Chromecast.
Jellyfin over Plex.
RPi or USB cameras over Nest.
Mycroft/Mozilla DeepSpeech over Google Assistant.
Zigbee/Z-Wave USB dongles over Hue/SmartThings hubs.
The downside of doing things this way is a steeper learning curve - you can keep your data locally, but you have to know how to set up e.g. the MQTT+Postgres integration with your plugins, and maybe run a Grafana server; you can run your own Zigbee controller instead of buying a proprietary hub, but that requires flashing a USB dongle with the zigbee2mqtt firmware through a hardware debugger.
People who want the advantages of a smart home, but without any data points even leaving the home, have alternatives already as of today. But I definitely can't say that embracing those alternatives, as of today, is a smooth path.