Storing and retrieving data has never been all that hard. The challenge is having user-interactive performance on complex queries against the data. Comparing and correlating and deriving and integrating and ... (lots of other analysis). For many "scaled" systems, 100M records/minute isn't uncommon... and while that's very likely possible with your design the question of economic feasibility enters. Solving these problems at scale with good economics is the playground of TSDB vendors today.