Different rocker ratios intake vs exhaust

This a trend I have noticed in recent years. Many cams are ground with extra exh duration & lift [ relative to the intake ]. I suspect the factory thinking was that with the restrictive factory exh manifolds & small pipes, the exh could use some help.
Add headers, free flowing mufflers & pipes, & extra exh duration not needed. [ Isky Cams Tech Tip: 'Is extra exh duration really needed' is a good read.].
So builders are using dual pattern shelf grinds [ cheap ] & using lower ratio rockers on the exh to cut back on effective duration & lift.
i have been using reverse pattern cams in the last 20 yrs, less exh duration than the intake. Many factory engines come this way.