It won't happen. Full stop.
Just the same as the marketing lies perpetuated by Bloomberg terminal competitors that they are the next "Bloomberg-killer". They are not (I've tried some of them, they don't come close, infact they are so far away its a joke).
The fact of the matter is financial data is HARD.
To ensure consistent quality takes a lot of time, a lot of effort and a lot of money. Data will have errors, some of them will be easy to spot (e.g. missing values) but others will be tricker to spot for the untrained eye.
Some financial data requires manual inputs which can't be automated (e.g. fixing bad OCRs, or inputting data that is only available in paper form).
The other fact of the matter is BREADTH.
Any Tom, Dick or Harry can have a good chance at getting you currency data, or BASIC data on US stocks, that sort of data is common as muck.
But only the Bloombergs or Refinitivs of this world can give you TRUE global coverage. Only the Bloombergs or Refinitivs of this world can give you more advanced GLOBAL data such as swaps, swaptions, CDS. Only the Bloombergs or Refinitivs of this world can give you true IN-DEPTH and GLOBAL fundamental data for any company on the planet. Only the Bloombergs or Refinitivs of this world can give you many decades of GLOBAL historical data.
You would need billions to properly compete against Bloomberg or Refinitiv. And that's only the startup costs of getting you to the point where they are today.