Price:Performance:Cost-to-Run are afaik the three metrics that will determine if something is the right solution. Barring custom accelerators or purpose-built hardware general compute is roughly as approachable for arm or x86 in terms of software applications that run on said hardware.

If the price is less and the cost to run is less, then the bottom line max performance may not be the leading factor in making a decision. It really depends on a few factors, and this article does a poor job even spelling that much out.