Other giant companies have fallen as well. RCA, Xerox, GE, Kodak, on and on.
The reasons are well known. They become bureaucratic, wasteful and ossified, and become unable to adapt to a changing marketplace.
I've seen this play out again and again and again in my lifetime.
Yes you're right. However on HN and similar tech/geek areas, the common theme regarding FB for a decade now has been direct or indirect implying of its coming demise. Which was what I was saying in my comment. Those people are not correct. It is being said in this thread and other recent threads too. If FB is still a $5-600B+ company in 2025, then these recent comments are also not correct.
Which is to say, it's hard to imagine FB dropping lower than the ~11th biggest US company and ~15th biggest worldwide[0] company at a $600B market cap in 2025. A valuation they did not cross until May 2020.
[0] Right now they are 8th in the US and world. Top 5 for earnings. Usually 5th-6th.
Especially funny because the downfall of Facebook has been predicted for a decade now. Since Friendster and MySpace each did not last that long.