Consider a Hubble-size lens at a distance of 200-1000 km. If I did my quick math right, turning just 20 degrees moves the focus by up to 350 km on the ground. And typically orbits have a pattern of gradually shifting, so the next orbit will capture a different slice.

Reconnaissance planes were largely obsoleted by satellites when digital cameras were invented (before that, satellites physically dropped film to ground to be developed), and as Russian anti-air missiles got better. The primary use for optical reconnaissance planes these days is for up-to-the-minute coverage of rapidly developing situations, such as in war, where the next satellite flyover might not be until several hours later.

(RF & radar reconnaissance planes are very important to modern warfare.)