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Thanks for the example. What you just did is one of the hardest things to communicate about data. A casual user would never notice this. I find "data curation" doesn't always get the importance it deserves.
Oh, man, tell me about it! To get from raw data to data you can use can be a hard, tedious and difficult slog. I agree that it's often undervalued. On the other hand, with Bloomberg you certainly pay for it! :-) And don't get me started with corporate actions (stock splits, mergers), dividends (some jurisdictions announce gross divs, Australia announces net divs; Korea announces AFTER the ex-date; some shares pay a d…
And time zones. And daylight savings. Oh my oh my. And Asian trading sessions with a lunch break in the middle.