She don't is found in various regions and varieties of English- you'll here it used in some regions in the UK; it's fairly common in London, for instance. I don't honestly see why it should be associated with a lack of education- it is non-standard, but plenty of educated speakers use non-standard forms. Care should be taken with non-standard forms as non-native speakers who say she don't will simply be regarded as making a mistake and not as using a non-standard regional form. Maybe the -s ending will disappear in the future- it doesn't seem to serve any real purpose as the other forms get by without any ending, but equally it might continue. Language is shaped by the speakers, who are the real owners. It's down to them, though I wouldn't be surprised to see non-native speakers being among the most vociferous supporters of it.
Grammar and spelling are definitely not set in stone- things change and the ease with which English can and does change is one of its strengths as a language for international communication.
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