Have you ever drawn a Curve SOP curve and then realized the place you drew it wasn't quite right and now you can only move individual points, and its 'Coordinates' parameter is not easy to edit, and you don't want to resort to the Transform node (out of a total obsession with neat node-graphs)? Here's your solution. It must be the most useless, useful invention.
A simple VEX script and a Python function do the trick. HDA and code here: https://github.com/arabadzhiyski/update_curve_coordinates
The HDA allows you to transforms a Curve SOP curve and update its 'coords' parameter. The original curve, if stashed, is available on Output 1. Once you hit the 'Update Curve Coordinates' button, the HDA will update the 'Coordinates' string field of the input Curve SOP (and you can delete the HDA after).
It requires a Curve SOP as input! Don't worry, it will warn you if you connect anything else.
Cheers!