"Base form control names of component's id, not allocated client-side id" - why?

[Kalle Korhonen]

In 22bd2c14b3c7d91ebd97cbc264882552c12044f7 (since 5.4-beta-31), Howard had
changed the form control name to be based on component's simple id instead
of the component's client-side id. This change is not based on any open
issue, so I'm just trying to find the reason for the change?

Kalle