I tried Resolve just now for Photos, and I'm not impressed.
The Sony RAW file rendered terrible compared to Lightroom.
I found the interface unintuitive and did not even manage to locate the much praised Color grading features. That tab opens with a Video view.
This needs some work to compete with Lightroom for Photos - I see that it's Beta 1, just saying.
I guarantee that it won't improve significantly even after several major releases.
Resolve is designed to be controlled with their "panels", which have lots of dials and knobs to turn.
The software only interface is clunky at best, and they steadfastly refuse to fix basic usability issues lest that undermine the justification for buying their hardware.
For example, cropping and rotating media in Lightroom is a totally different experience compared to Resolve (photo or video, they're both bad!).
Lightroom lets you fine-adjust sliders by pressing shift so that instead of rotating an image by HUGE AMOUNTS BACK AND FORTH you can easily remove a 0.4% tilt without having to type in the numbers into an "angle" text input box like a savage.
Lightroom's crop and rotate controls do a "constrained crop" by default so that you don't get black wedges in the corners of the image. When the background is already mostly (but not perfectly) black, this can be infuriating to fix in Resolve by alternatively rotating, cropping (numerically!), rotating, cropping etc...
While I'm complaining about Resolve issues, it gets the color temperature scale wrong, as per this video, to the point where I find it nearly unusable: https://www.youtube.com/watch?v=WADuXiMZxq4