Mask Feather - Add visual indicator when mask has feather

This would only apply to the Feather slider in Mask properties, IOW a very limited use case mainly for simple geometric masks.

For any complex real-life masks the Feather slider is totally inadequate. My own masks generally have a wide spectrum of soft and hard edges, much of it painted in. It would also exclude the advanced Select and Mask function.

I think this only masks (yes, pun intended) the potential for a real improvement, namely a "smart mask" function that would make masks truly re-editable across the board. That's not as simple as it sounds, of course, but one start could be to make Select and Mask settings reversible.

Of course, we'd have a ton of complaints about Photoshop "bloat", as this would no doubt claim further memory/scratch resources.

There are other ways to feather a mask (hit Q and apply gaussian blur, for example) so how does that work?

no moderators here? as usual...

I support the idea! (should be moved to the Ideas section)

The best place to submit a feature request would be https://feedback.photoshop.com/photoshop_family.

It wouldn't be just a glance at the Layers panel, but you could quickly check if there's a feather on a layer mask by Ctrl (PC)/ Command (macOS) + clicking on the thumbnail of the layer mask to load the selection. Then hit Q to turn on Quick Mask. Then you should be able to see if the edges are blurred or not.