The author seems to have a different view of what an enterprise application is than I do. Of all the companies he mentioned, only Salesforce and Workday look "enterprisy" to me (plus maybe Box on the lighter side of enterprisy). If I had to guess, I would say that's the source of the style over substance disconnect.
I wouldn't say Stripe is 'enterprise', but I wouldn't call it consumer either. It probably could generically fall under the category of business-to-business. I'm not sure if the author was lumping in B2B with enterprise. It's possible larger enterprises may use Stripe in the future.