Krita is geared towards illustrative work versus photo vs editing/product design. While it can do both, it misses or is behind in several areas

1. Photoshop has a much better template and smart referencing system

2. Photoshop has better photo retouching tools in the form of healing or switching working spaces to tune filters.

3. Photoshop has better image manipulation tools like warping and perspective correction

I do really like Krita, and I’ve replaced Photoshop use for illustrative use cases for several studios and individuals with it. So it really depends what you do, but Photoshop just has a lot of little and big things that add up which prevents me switching myself.