We had EVs over 100 years ago and folks already knew the advantages of electric power over fossil fuel power. However, batteries have been the limiting factor for awhile. Even now, only Tesla seems to have batteries that meet consumers power/range/cost expectations and they exclusively own the largest battery plant in the world.
I'm not sure we can blame VW for being slower to EVs than Elon Musk and FWIW, the VW company seems to be pivoting to EVs the fastest. The Taycan - a VW product - is the first car that's competitive with a Model S.