Most orgs working with small data I've seen will just fall back to the tutorial version of some big data tools (often times just eating the unused infrastructure cost for something like Hadoop when they're generating biweekly reports). Most project managers have a dream of their project scaling up and want to be prepared should a dream become a reality. And if you "under-engineer" (by which I mean specifically engineer for the problem the company is facing), you'll get called out by every armchair developer for not going with the "obvious, best solution."

I'm not bitter; you're bitter. /s