You are conflating fixed point vs floating point and decimal vs binary, which are entirely different things. You can have decimal floating point numbers and bin

You are conflating fixed point vs floating point and decimal vs binary, which are entirely different things. You can have decimal floating point numbers and binary fixed point. You realize that decimal numbers also have the exact same types of rounding issues as binary numbers right? The only difference is that the former allows you to divide by both 2 and 5 cleanly, whereas the latter only lets you divide by powers of 2. If you want to divide by 3, 7, 11, or compute a square root or an exponent, using decimals is not going to save you from having to reason about rounding.