“My greatest failure in life will be if I cling on to an existing business model to the point that I'm regulated by the EU. So make sure that we adapt to the changing market and respond to consumers.”

Greatest failure: clinging to a business model until regulators take it from you

Jacob's parting principle for any founder. Don't let inertia turn your business into Apple — be the one who concedes early when the market signals change, instead of being forced into change by Brussels. The lesson generalizes far beyond mobile platforms.