The old days of hard piping sprinkler heads in suspended ceilings was always a hard task, especially when the heads were specified to be centered.
It involved pipefitters to work tediously to get them in the center with hard pipe.
Now with the flexible piping, and self-centering jig that snaps in the grid system, it is a snap.
Sounds great I also have not observed this. It is possible that we will have plumbers in the future that will not know how to cut and thread pipe. They already do not know how to lead in a cast iron pipe but I guess we call this progress