Binance's decentralized exchange has a lot of backing: Its mother company, Binance, a huge pool of promotional funding and a large number of users from its regular exchange. This will ensure that the push for DEX adoption is well supported. If DEX adoption fails, it only means, it's not useful or convenient.
That's why I do believe Binance can always be most used decentralized exchange starting from now for the next two years or even more. They just need to keep the momentum, the performance and stay consistent about it, bring the best services to people and try to avoid any drama.