This is 100% it. Typically the smaller you go with SFF, the more you need to plan out all your parts and how they'll fit together. This makes changing builds harder down the line as what works best within the requirements of one case may not be the best option for another case.
That said, sometimes case releases don't line up with planning the rest of the build with new parts.
In this case, planning a build with current parts for the C4/P1, but building in an NR200P and transferring it later works out, since part compatibility lines up between the three for the most part.
In my case, I'm deciding between temporary build in the NR200P with hardware that I can easily move into something like the C4 or P1 in a year, or a build in a T1 that requires specific hardware and compromises that may not be needed (or be optimum) in the C4 or P1, and wouldn't transfer over if I changed cases. (Slim fans, grub screws, slim radiator, specific RAM, tubing, cpu blocks, etc.)
