I hate skeuomorphic UI and wish it would die. The number of users that have ever used a hardware compressor, eq, gate, analog synth etc is much smaller than the number of users that have grown up creating music completely on their PC. I think it makes more sense to focus on the second group.

The plugins I work on tend to look more like software than any piece of hardware. I still use knobs because they are more efficient use of screen real estate. When you click / drag them, left is decrease, right is increase. You don't need to drag around like a physical knob.

Here is one set of plugins I did: https://www.tracktion.com/products/daw-essentials-collection