Basic principles that change with the time aren't basic principles at all. Is the First Amendment guaranteeing freedom of speech irrelevant now because we aren't communicating via handwritten letters and bulletin boards anymore?

The modern conception of the First Amendment is pretty recent. It didn’t even apply to state governments until the 1920s.

https://en.wikipedia.org/wiki/Gitlow_v._New_York

Their “basic principles” included counting some humans as 3/5 of one.

John Adams himself signed https://en.wikipedia.org/wiki/Alien_and_Sedition_Acts into law, too.