I don't see any problems with your presented statement.

I was rather shocked when I stumbled across the new sysread behavior for UTF-8 streams. It seems rather nonsensical to me, demonstrating a lack of understanding or appreciation of several of the reasons why Perl even has sysread().

One not-yet-published module of mine notes:

At least in some versions of Perl, if a file handle has the ":utf8" encoding layer in place [such as via binmode()], then sysread() does some weird and unfortunate things under the covers beyond just calling the read(2) system call once. This makes 4-argument select() incompatible with sysread() for those versions of Perl (when the ":utf8" layer is used).

[....]

You should probably avoid the ":utf8" layer for file handles you wish to use with 4-argument select().