Not a single one of us any longer holds the rights guaranteed by the 4th Amendment.
In the same way that a man who lives in DC and doesn't own a gun, in the same way that a Chinaman or a Cuban who never speaks his mind has his rights to do so violated all the same, no investigations without warrants need take place against any one person inparticular for their 4th Amendment rights to be negated.
The fact that probable cause and a warrant are no longer required is all that is needed.
Free people hold rights even when they choose not to exercise them.
Probable cause is still required.