I've been lurking on this thread a little. This discussion has gone “all over the place”, however I’d like to point out that part of the reason NBSP has been used for thousands separators is because that it exists in all of those legacy codepages that were mentioned predating Unicode.
Whether or not NNBSP provides a better typographical experience, there are a lot of legacy applications, and even web services, that depend on legacy codepages. NNBSP may be best for layout, but I doubt that making it work perfectly for thousand separators is going to be some sort of magic bullet that solves any problems that NBSP provides. If folks started always using NNBSP, there are a lot of legacy applications that are going to start giving you ? in the middle of your numbers. Here’s a partial “dir > out.txt” after changing my number thousands separator to NNBSP in French on Windows (for example). 13/01/2019 09:48 15?360 AcXtrnal.dll 13/01/2019 09:46 54?784 AdaptiveCards.dll 13/01/2019 09:46 67?584 AddressParser.dll 13/01/2019 09:47 24?064 adhapi.dll 13/01/2019 09:47 97?792 adhsvc.dll 10/04/2013 08:32 154?624 AdjustCalendarDate.exe 10/04/2013 08:32 1?190?912 AdjustCalendarDate.pdb 13/01/2019 10:47 534?016 AdmTmpl.dll 13/01/2019 09:48 58?368 adprovider.dll 13/01/2019 10:47 136?704 adrclient.dll 13/01/2019 09:48 248?832 adsldp.dll 13/01/2019 09:46 251?392 adsldpc.dll 13/01/2019 09:48 101?376 adsmsext.dll 13/01/2019 09:48 350?208 adsnt.dll 13/01/2019 09:46 849?920 adtschema.dll 13/01/2019 09:45 146?944 AdvancedEmojiDS.dll There are lots of web services that still don’t expect UTF-8 (I know, bad on them), and many legacy applications that don’t have proper UTF-8 or Unicode support (I know, they should be updated). It doesn’t seem to me that changing French thousands separator to NNBSP solves all of the perceived problems. -Shawn http://blogs.msdn.com/shawnste
