I went from freenas to unraid and couldn't be happier.

Unraid has a ton of really amazing features, it's super easy to use, the docker support is great (freenas didn't have docker support when I left), the parity drives are magic, and just being able to slap random disks of any size in your NAS is great.

I've had a few issues with freenas, but I've never had a single issue with unraid. That shit just works.

Edit:

I have a live stream porn downloader, that'll watch when people come online and start capturing the stream. I don't want this to be part of my system and putting strain on it, so with unraid I'm able to put disks in my system and use a plugin called unassigned devices, which allows me to add them to the system, but have them be separate from my main array.

That's why I just love unraid. The flexibility is great.