It can be very important. For example, Fujifilm released a firmware update for the X-T3 (2018) that provided some huge gains in autofocus performance, bringing

It can be very important. For example, Fujifilm released a firmware update for the X-T3 (2018) that provided some huge gains in autofocus performance, bringing the autofocus in line with the newly released X-T4. There have also been some updates that e.g. allow better use of the camera as a webcam.