The theory of Eddington.
If you start off riding 25 milers. Complete 25 of them and you’ve got an Eddington of 25.
To get to a 26 Eddington, you CAN’T use any of the 25 mile rides you’ve already done, so you’re committed to ride 26 more rides of 26 miles each.
To get to 27, you’re in the same predicament as you were when you finished your 25th ride of 25 miles and decided you want an Eddington of 26.
To get a really big Eddington number several decades in the future, build up distance as fast as you can, riding as far as you can and keep doing that.
Don’t mess about riding short rides over and over. Increase your distance up to 400 km randos and keep doing them until you have got 250 of them.
You are on a thirty five to forty year quest.
Then, you have some bragging rights and receive your club’s Lifetime Achievement award.