For the past like 30 years I feel there's never been a time some commercial Mac program hasn't filled a simple niche. I remember someone last year posting a Show HN for an ffmpeg wrapper for Mac with a limited feature that focused on transcoding and made $9k in the first 4 months.

Or in the late 90s when there was a commercial program that allowed OS 9 to show real-time window previews while dragging rather than merely showing the window border outline.