but it's really weird to look on those in hexdump
It's the same kind of thing as computers and calculators switching from decimal hardware to binary hardware 100 years ago.
Not quite. ENIAC, for example, did calculations in decimal, and it was finished in 1945. There may be more recent examples.
If you include binary-coded decimal, that still includes machines made in 1970 or later, like the IBM 1401.