Seems sharper than the Sony 12-24 2.8. The straight lines in Jared's video are very straight, I like that. Want to see it used for more architectural stuff. 2.8 Isn't an astro lens for me, but seems decent there as well.
Not trading it out for my super cheap Viltrox 14/4 yet. Too much for me right now, but it's on my radar.
In this Czech review that compared Nikon Z version with Z 14-24/2.8 S the Tamron is quite sharp in center and corners at 12mm wide open, but at 14mm and longer the corners are softer than 14-24.