I recently upgraded my Flickr account for the same reason. Basically, Flickr is acting like a "Cloud" for a lot of my photos, and if I didn't pay for Pro, I wasn't going to have that Cloud. Also, the photos that I have placed on RTA forum trip reports would have gone "Link missing." The cloud, to me, was worth the $5/month it costs.
Great report. I suspect that as more and more states join California in the Shelter-in-Place mandate, I'll have more time to re-read everyone's old trip reports (including my own). I just got the word that I won't be going back to work until just after Easter, if then.