Think of an MVP as a series of experiments
indiehackers.com
indiehackers.com
Add far as I know no major still existing product was released as minimum viable product.
Customer focus yes, selling prototypes no.
Exactly what the article says.
There are endless examples of SAAS or software products that still exist today that were bootstrapped and had public MVPs.
(Compare e.g. Dropbox UI between versions. In fact modern version has regressed quite a lot just to get shiny.)