@alexJ682T
Depends on your perspective, I guess. I view max script as customization on steroids, although admittedly there is a learning curve. It is particularly powerful when you need to repeat an action or a whole series of actions over hundreds or thousands of scene objects/materials.
But in terms of changing/customizing default settings in Max there are actually quite a few that you can now set via the DefaultParamInterface exposed in maxscript in Max 2021.1 (but not the Extrude modifier settings). And there is an easy to use script that makes the process simple. For example, below is a screenshot of this CustomDefaultParamManager script in which I set the weld threshold to .001 for the Edit Poly modifier.
The script is available and explained here:
https://cganimator.com/3dsmax-2021-1-custom-default-parameter-and-the-manager/
So if you think you may want to change other default settings I suggest you download the script as it lets you browse through the supported default settings that can be changed in max. Hope it helps.