What are the advantages of pagers?

You never have voicemail to check when people call them, they hold a charge much longer than cell phones and usually have cheaper batteries, you never have to pick up and talk to someone when you get a page, they sell pretty cheaply since cell phones and text messaging became the norm....i dont think they mess with electrical equipment as much as cell phones do (otherwise why would doctors wear them around all that sensitive machinery that cell phones are forbidden around)