That's up to you. I know you probably want someone to tell you the answer, but that would be like me telling you what flavor of ice cream I've decided you like. I will tell you that I use both Hubitat and Home Assistant. Read the prologue of the Home Assistant Device Bridge thread and you'll understand why.
I personally would. There's too much negative I've read about it, and frankly you can do just about everything with Hubitat and Home Assistant together.
Well I'm not going to pretend I know what the Yellow hub is going to be. I would have bought a Home Assistant Blue myself if it were available, but times are tough for obtaining electronics. I've been running Home Assistant Supervised in Virtual Box on an old MacBook Pro laptop for a few weeks. Before that I was running Home Assistant Core in a python virtual environment on an older MacBook. Both are very capable. Supervised brings both some advantages and some disadvantages to HA Core, and a VM also brings with it some advantages and some disadvantages. But if you want to try it out for free and you have an old laptop available, setting up Virtual Box is fast and easy. As soon as the aluminum case I ordered arrives, I will be switching off of HA in a virtual environment and onto a Raspberry Pi 4 8GB with a high endurance microSD card.
So for some, HA is plenty, but for me I enjoy the ease of building complex automations with Hubitat, combined with the large amount of supported cloud-only devices that HA has. I try to stay local, but that's not always possible without limiting myself more than I'm willing to. I also prefer to have my Zigbee network spread out between four different radios. In my case, that is Hue for bulbs, HA for Xiaomi devices (they are super stable with a Conbee 2 Zigbee USB), and HE for two different categories of Zigbee devices. My main HE hub has most of my Zigbee and Z-Wave devices on it, except for the Xiaomi stuff. My secondary HE hub has the problem children on it (i.e. Old chatty Z-Wave devices and problematic Zigbee devices such as old OSRAM stuff). I have a third HE hub, but I just use it for running a database and testing on occasion, so its radios are disabled.
Again, this is going to be a personal choice you have to make. Both work, but I much prefer the integration with Hubitat. It's much faster and more responsive than the HA integration is today. However, there's a new Insteon control panel that is currently an add-on to HA, but will soon be integrated into the HA Insteon integration. It allows you to set Insteon device defaults like Ramp rate and dim level defaults. So if I need to make a change to one of my Insteon devices, I enable the HA integration, make the necessary adjustments, and then disable it. Much more convenient than doing the button dance at each device.
