To my ex-programmer ears, phrases like "web 2.0" and "industry 4.0" always sound a bit odd. Sectors don’t have release dates, unlike Windows 10, iOS 12 or Android Oreo. Oddly, one field that does have major version releases is the law: it would be quite reasonable to view 25th May 2018 as the launch of Data Protection 3.0 in the UK. Looking at past release cycles, it seems likely to be fifteen to twenty years before we see version 4.0.