It might change your timeline. For example, when I ordered my Macan, thermal/noise glass option would delay freeze by a few weeks. Without this option, the freeze was in two days.
Not a representative experience, but here is my interaction with SF dealer:
I sent them an email, asking very specifically if they have a custom allocation and I shared my desired config. They chose to ignore my request, and instead replied with a boilerplate link to look at their lot inventory...