[volk45]

One anecdote I can provide - the department I volunteer for swapped to software based (see: mobile app) personnel calling because the county swapped to the system.

The software can quickly load box data (PDFs of hydrant locations and building details), as well as provide route mapping for individual at their location compared to call.

Additionally, every volunteer has a somewhat modern smartphone in my rural/suburban area. Pagers are not in huge demand anymore.