Without disputing anything in the article, I often see little to no value placed in consistency, simplicity, and repeatability with these kinds of analysis.
In this case, I would prefer to manage 1 set/type of hardware for all my uses unless I really needed to deviate. If the difference is $100 in overkill for a Pi-hole, but right-sized for other use cases, I find value in the consistency.
1 form factor, 1 OS, 1 set of hardware compatibility, if a script works 1 place, it works everywhere, etc.
In this case, I would prefer to manage 1 set/type of hardware for all my uses unless I really needed to deviate. If the difference is $100 in overkill for a Pi-hole, but right-sized for other use cases, I find value in the consistency.
1 form factor, 1 OS, 1 set of hardware compatibility, if a script works 1 place, it works everywhere, etc.