I really hope this doesn’t turn into yet another case of judges looking at irrelevant facts when making decisions.

The fourth amendment does not say “private conversations,” so when police started tapping phones, the courts focused on whether the phone tap physically intruded on somebody’s house, papers, or effects. Police apparently could tap phone conversations by watching reflections on a nearby window, and the fourth amendment didn’t apply because there was no physical intrusion. The “reasonable expectation of privacy” test come from Katz v. US ( https://supreme.justia.com/cases/federal/us/389/347/ ) where the Supreme Court realized that whether there was a physical intrusion was irrelevant.