> So - given that we don’t know upfront what level of granularity each customer will need, we store every single location update.

Maybe Im cynical but interesting that "the business" didnt start to check it to cut costs. I know that customers love this feature. Cynically I can see it costing more, so some customers would drop in.

Also it looks they rewrote a log / timeseries "database" / key value store? As pthers mention sounds like reinventing the wheel to get a cool blog post and boost career solving "problems".