Agree with dropping most of those old formats, but I'd like to point out that the last word has not been written on a couple of these:
- IEEE floats have clear holes that people are trying to fix.
- I was just noodling around with string format ideas a couple days ago that drop support for ASCII, a 60+-year-old standard that is clearly wasting valuable space.
My point is that just as we standardized on these machine widths and addressing schemes for most hardware over time, new tech is going to obsolete some of these standards also in time, so it would be good to not freeze these two if we can (I'm familiar with Swift's core support for Unicode, seemingly down to the ABI level, but I expect that that can be worked around).