I haven't done any structured training since the pandemic started, unless strict recovery or endurance efforts count. I decided that I'd lose motivation to flog myself with intervals when I had no tangible goal with events and group rides cancelled. However I still used power continuously to keep track of my time in zones, training stress, to pace, and compare to past efforts.
L/R balance is also useful to me as I've changed shoes, cleat position, saddle height and setback, and crank lengths, all which shift my power balance one way or the other in ways I wouldn't have been able to tell otherwise.