[rurban]

from the proposal http://www.open-std.org/jtc1/sc22/wg14/www/docs/n2218.htm

"Nowadays Unisys emulates their old architecture using x86 CPUs with attached FPGAs for customers who have legacy applications which they’ve been unable to migrate. These applications are unlikely to be well served by modern C++, signed integers are the least of their problem. Post-modern C++ should focus on serving its existing users well, and incoming users should be blissfully unaware of integer esoterica."