Because you're tied to an expensive fixed-size SSD that you can't upgrade and the system hogging disk space reduces the space left to store the colossal 4K vide

Because you're tied to an expensive fixed-size SSD that you can't upgrade and the system hogging disk space reduces the space left to store the colossal 4K videos that every phone shoots these days and the VM snapshots you need? Also every iOS virtual image includes identical files so you end up with about 5 GB of identical sample photos and other garbage for each iPhone image. Why they can't put them in a single directory and symbolically link to them is beyond me. I say this with a 2012 MacBook that I've put a 1TB SSD in and a 2016 MacBook Pro with a fixed non-upgradeable SSD. Constantly fighting for disk space.