I like constant folding. LabVIEW says "this is going to be a constant".
There are some times that I want to see the actual values of the constant. In the middle of a large VI it can be a pain to de-rail to make a constant, then come back. It can be easier to look at an array of values for troubleshooting.
I wish there was a way to right-click and either show what constant-folding gives, or even convert it to an actual constant. This is going to change the development side, not the execution side.
While it doesn't have to be reversible, it would be nice to know I got it right, then revert it to code, in case I want to vary the generation of values at a future time.