Having custom/fixed frame padding while exporting image sequences is a good idea. VFX software like Nuke doesn't allow multiple frame paddings.

Ex: If we render image sequence which ranges from 1 to 1000 frames then it would be

Images.01.png
Images.02.png
....
....
Images.99.png
images.100.png (Here the padding > 2)
....
....
Images.999.png
Images.1000.png (Here the padding > 3)

In the above case, Nuke will interpret Multiple reads nodes for each padding increment.