[defrost]

Adding to your comment, from my perspective (exploration geophysics)

> and just contains tons of data coming in from sensors.

it's also desired to, on the fly, deal with missing sensor data, clearly bad sensor data, identify and smooth spikes in data (weird glitch or actual transient spike of interest), apply a variety of running filters; centred average is basic, parameterised Savitzky–Golay filters provide "beefed up" better than running average handling .. and there are more.

It's not just better access to sequential data that makes a dedicated time series engine desirable, it's the suite of time (and geo spatial) series operations that close the deal.