I had ridden audaxes, up to 400km, before, but only started chasing SR in 2007, at the age of 50, with the aim of riding PBP. I've never been a fast rider, but enjoyed the satisfaction of completing a PBP, LEL, and several long Italian brevets. By 2019, I had managed 12 SR's in a row but failed to complete a couple of 600km rides that year. Then 2020 messed up any serious cycling plans, and post-retirement, I have relaxed a bit , so the idea of rushing round on longer audaxes , watching the time limits, doesn't appeal so much... Still enjoying local 200's, 300's, and even route checking 400's over 2 days, and other helping out a bit at the KWAC audaxes. As for RRTY, I did that once, and have no plans to do another one. So to those wishing for retirement, enabling more audaxes: be careful what you wish for! You might find that you enjoy shorter rides, other types of riding, or even spend time on other hobbies instead.