Is Migrating From On-Premise PBX to Cloud VoIP Actually Worth the Hidden Costs in 2026

I spent the last 90 days running a controlled migration test between a legacy on-premise PBX and three mainstream cloud VoIP platforms—RingCentral, Nextiva, and 8×8—on behalf of a 28-person WordPress development agency that handles client support calls across three time zones. The objective was not to read spec sheets, but to record what actually happens …