That’s likely true of most things. Apple, Coca-Cola, The United States, Christianity, humanity, etc. Nothing lasts forever.
The problem is that people say “at the end of the day” as if today is that day. And they’ve been saying it for a long time.
Apple might lose its popularity next year, or sometime in the 2090s. But it’s highly likely they will have the best-selling mobile phone model again this year.