Getting call records from the phone company, a private business that collects it's users' data, used to require a warrant. Why is it different now? Only becaus

Getting call records from the phone company, a private business that collects it's users' data, used to require a warrant. Why is it different now? Only because it's so trivial to hand over access to the database? I think in the past, the only thing that provided protection from illegal searches and seizures was the physical impracticality and friction involved in doing so. The warrant just allowed LEOs to dedicate their limited resources to a particular search. That is no longer a constraint.