Krita's export function does not remember customized file format settings. For example, the default JPEG quality is 80. It's too low for me so I always change it to 90. Krita doesn't remember that, so I have to change this parameter every time when I export a new file.

On the other hand, Save function can remember customized setting. So as a workaround, I first save to a format with customized settings, then export without the hassle in the future.

Since the formats we export to (JPEG/PNG) are usually not the ones we want to save to (KRA), a user might not learn this but simply think Krita not being able to remember export settings. It'd be helpful for Krita to remember customized export settings.