To judge Krita, create a piece that uses the brushes, layers, masks, color settings, and tablet input you rely on. Save it, close it, reopen it, and export a delivery format. Inspect line quality, color, and layer integrity on another machine or in the recipient's software.
A flattened preview is not a migration test. Check whether source files remain editable, whether shortcuts and brush presets can be carried over, and whether collaboration requires another format. Keep the original project until the full handoff is proven.
Akousa