"Kind of". My understanding is that block floating point actually makes a bunch of numbers have the same exponent (probably the largest among the group). That's

"Kind of". My understanding is that block floating point actually makes a bunch of numbers have the same exponent (probably the largest among the group). That's not exactly the same as reordering bytes where exponents can be different (but maybe similar). So "block" is not a lossless transformation/compression.