parametric modelling is good for minor changes that don't change the general topology of the part. Otherwise you'll run into topology naming issues that you hav

parametric modelling is good for minor changes that don't change the general topology of the part. Otherwise you'll run into topology naming issues that you have to fix by hand (at best) or a complete redesign of the part. (at worst) there are ways to mitigate the side effects (e.g. using reference planes instead of part topology as feature references) but it's a chore sometimes. software equivalent of topology changes would be perhaps changing from using a certain set of APIs to another for reasons. If only equivalent functions are used it's not an issue. But if there's missing functions that you have no choice but to recompile the library and add logic to manipulate the information, that's a lot of work! it's the same as if that hole that you parametrically positioned hits a spar and you have to redesign the surrounding structures.