Are PDF's Obsolete?

No.

In fact PDF's are taking over from the previously ubiquitous Microsoft-only formats. Not everybody can run Microsoft software. If you want to be certain that people can read your document, send it as a PDF.

Which is only natural for a "PORTABLE Document Format".

Beyond being a great example for Betteridge's Law of Headlines[1], this post essentially seems to say "PDF is bad at things PDF was never supposed to be used for". Well, go figure.

[1]: https://en.m.wikipedia.org/wiki/Betteridge%27s_law_of_headli...

wow