Last time I was in charge, I had all team members to serve in all roles (marketing, sales, QA/test, docs & L18N, build meister, tech supp, dev, etc), even if it was just job shadowing. I even sent devs to conventions and customer site visits.

Initially, lots of complaints and pushback.

Afterwards, a lot more collaboration, emphasis on global vs local optimization, and dare I say increased empathy.

Highest functioning team I've ever worked on. I still miss it.