I was using HomeSeer for years, but about a year ago, they wanted to go down the 'subscription' route if you wanted Alexa integration. At first I purchased an Aeotec (smart things) hub which works great for some of the new protocols (Z-Wave, Zigbee, Matter Gateway, Compatible with Alexa, Google Assistant, WiFi) and it was real easy to setup and works great with Alexa but it doesn't have some of the more advance features that HomeSeer or these other platforms have.
Some of my Z-Wave devices date back to 2009 (intermatic) and started developing problems so I looked into upgrading the Z-Stick and it made sense to go with the Aeotec Z10 Pro because it looked like I could upgrade my existing network without having to start over again from scratch - but due to firmware issues, it didn't work out.
Home Assistant has it's own os so it was very easy to get it up and running in a VM - using the Aeotec Z-Stick 10 ($60) but Alexa integration is lacking where I understand with Hubitat it is pretty easy to setup
Anyways the Home Automation dashboard is light years ahead of Home Seer but everything is pretty much still working and I have transitioned over many devices to Hubitat from HomeSeer
What I like about using a standalone Z-Stick is the software that can backup and restore the Z-stick so if your trying to add a new device and it goes sideways on you, I just restore the previous backup and try again