=head2 Pre-PerlIO IO implementations
-Perl supports being built without PerlIO proper, using a stdio or sfio
-wrapper instead. A perl build like this will not support IO layers and
-thus Unicode IO, making it rather handicapped.
-
-PerlIO supports a C<stdio> layer if stdio use is desired, and similarly a
-sfio layer could be produced.
+In theory, you can currently build perl without PerlIO. Instead, you'd use a
+wrapper around stdio or sfio. In practice, this isn't very useful. It's not
+well tested, and without any support for IO layers or (thus) Unicode, it's not
+much of a perl. Building without PerlIO will most likely be removed in the
+next version of perl.
+
+PerlIO supports a C<stdio> layer if stdio use is desired. Similarly a
+sfio layer could be produced in the future, if needed.
=head1 Future Deprecations