Perseverance does bring tiny improvements, which I notice because my yoga practice is the exact same sequence every single time. Last spring, after 5.5 years of practice, I got my hand down in revolved side angle pose, with my back heel down. And since this past fall I am able to get my feet and my raddled knees safely in some kind of lotus pose for a short while.
Ashtanga yoga is a good reminder for patience, which is (still) not my virtue.
(Vejle, Denmark; September 2019)