To upgrade, or not to upgrade, that is the question

After reading the comments on ethernet cables, I am curious to what y'all would say about this setup, and should I try to improve it.  My streamer is a 70 foot run to the modem/router and I am using basic best buy ethernet cable through a floor and 2 walls.  SQ is pretty good from Qobuz.  What if anything could be an improvement?