)That’s not 90%, but it really’s an enormous share, Which share is strong. Much more importantly, monopolization also means a chance to Manage price. And Apple controls price, mainly because its customers in essence cannot switch. It's the ability to “forego innovation without fear of losing customers to competitors,” https://financefeeds.com/the-backbone-of-brokerage-why-back-end-systems-are-essential-for-modern-trading-firms/