The numbers people quote are real. A typical travel-industry email newsletter opens at 18-22%. A push notification — whether web push to a browser or mobile push to an installed app — opens at 85-95%. That's not marketing puff. That's how the channels work.
But push doesn't replace email. They do different jobs. Email is good at long-form content, photo-rich storytelling, segmented offers that need explanation, and content guests can search and re-read months later. Push is good at brief, time-sensitive, single-message updates that lose value if read tomorrow. Choose one over the other and you weaken your marketing. Use both well and you reach guests across the full range of moments that matter.