[Zelphyr]

Very much this. Sooooo many times I hear the cry of "does it scale?" To which I reply, "Does it need to?!"

At my last company we had a developer question scalability constantly despite the fact that the average customer of an instance of our product had about 200 users.

[mmt]

I like to add, "does it need to beyond what's delivered by Moore's Law?" (which I use a metaphor for all increases in computing performance, including I/O, which has, of course, increased at a much slower, but far from zero, pace).

If your CPU utilization from user growth is doubling every 2 years, but so is CPU capacity, then don't worry about it.