There are special considerations for the CM Elite 130 because of the PSU location at the top back which give you few locations into which spare cables can be stuffed. It also depends on the power supply, and the length of cables with which it comes. Using an SFX power supply with adapter plate would give you quite a bit more room. Finally, your experience with wire wrangling and cable planning/management counts.
Reviewers and many builders use non-modular systems and they work.
Personally, I have reached that point in my like where ease of use and time saving have value to me. If I were building in a cooler Master Elite 130 for the first time, I would look at a semi-modular or fully modular power supply or a non-modular SFX. If someone gave me a non-modular ATX supply, I would use it.
The second time, I would know the right answer.
BTW: The ML07 is a 14 liter case, the Cooler Master Elite 130 is an 18.5 liter case and my case has that riser inside, which limits space and cable management.
I'm sure a non-modular PSU would work fine, but I might choose to save aggro by using a semi-modular, modular, or SFX supply.