Continuing the discussion from Track width and clearance:
KiCad changes/updates features constantly, as in, literally every day.
I am using a nightly of V5.1.2 and…
Interestingly to me, I ran into this issue early this morning. My project was advanced enough that I had assigned Net Class Memberships to most of the nets in the project. I had a Net Class member that I wanted to change, and to my happy surprise all of the tracks on that net were automatically changed.
I did not test this functionality on the “Default” Net Class, but I’d figure it to be a bug (and quickly fixed) if it did not work the same.
If You want the fastest response to Your question, make it as easy as possible for all forum members to figure out Your answer.
Otherwise, like in the case above, I want to give guidance to a member with a question, but that ends with my first post being the question, “What version of KiCad are you using?”