Had a friend do a ride Saturday morning then text me that he "beat me" up a 4.5-min climb. That climb was already on my route for the day, so I took a dig at it about 70 miles into my ride. Ended up putting over half a minute into him with a rolling ~4-min effort at 389W.
Endurance has always been my weak point, so it's nice to see improvement in late-ride power.