Yep. And devoting more resources to this, IMO, does not have the payoff of devoting more resources to making the language better or improving Rust on T1 platforms.
I think C, for example, was held back by support for esoteric platforms, such that the language doesn’t even say that a byte is 8 bits, or what the encoding for a string is. It gives great flexibility, but it has huge costs.
That is likely due to the fact the historically that wasnt the meaning of the word. There is a reason the RFC for IP uses octet to refer to 8 bit bytes. Another example of an old document that doesnt use byte to refer to 8 bit bytes is the Common Lisp standard.
So even though the current definition of byte is 8-bits the fact that the C standard uses the old definitiom is most likely because it is a document that can be traced back to an era were there was more diversity in the hardware architectures in common use.
There are a lot of platforms which aren't as stupid as "bytes aren't 8 bits" and are still useful to support. Rust supports TWO architectures with anything other than broken promises.