Everything going to PJsip now? port 5160

I had a heck of a time yesterday on a deployment and noticed everything has changed in the new version of freepbx and now everything is on port 5160. I changed it back because we have not tested pjsip. What do you guys recommend going forward? What is the difference and benefits of pjsip? How will future upgrades affect existing deployments?

pjsip is buggy

That topic is hotly debated.
Some people still experience bugs with it, others, especially Sangoma, would definitely recommend it.
Check this lengthy thread: