Is it easier to remember something if it is expressed in a funny and/or fascinating way rather than by learning through repetitious exercises that hopefully instill the necessary understanding ?
The limit concept is very hard for novices, the concept of the infinitesimal was argued about for a long time by experts before it was finally included in textbooks. I don't think repetitious often uninspiring exercises could cover the 'subtleties' of limits or differentials or any related concepts that often require $very$ creative approaches to understanding them. Yet maybe a very creative even artistic approach could make such ideas 'reachable'.