This feels so obvious and simple how is this not already a standard thing everywhere? Is it because the mantissa and point position don't both fit into a single register?
It already is; the author is trying to sell a solution to a problem that is known, well-understood and worked around, often with programming language types like `Money` or numerical calculation libraries. The "30 year compound interest inaccuracy" problem was solved 50+ years ago.
I'm really not sure what the angle of the author and their "organization" is, which was only created this month. The library and idea is cool and all, but it strongly implies the author didn't actually do any research before building a solution, one that probably (but I'm not qualified to say) has some issues they overlooked. See e.g. https://cs.opensource.google/go/go/+/master:src/math/big/flo... for a modern implementation of big accurate floating point numbers.
fake edit: reading that this was AI generated, my time and attention was wasted on this.