As an SRE/SysEng/Devops/SysAdmin (depending on the company that hires me): most people in the same job as me could easily call it out.
You don't have to be such a big nerds to know that you can fit 6TB of memory in a single (physical) server. That's been true for a few years. Heck, AWS had 1TB+ memory instances for a few years now.
The thing is... Upper management wanted "big data" and the marketing people wanted to put the fancy buzzword on the company website and on linkedin. The data people wanted to be able to put the fancy buzzword on their CV (and on their Linkedin profile -- and command higher salaries due to that - can you blame them?).
> In other words, it's quite simple to sell complexity or obscure technology for most of these people
The unspoken secret is that this kind of BS wasn't/isn't only going on in the data fields (in my opinion).