LCI, Lippert sells a number of different slide systems. And WBGO has used all of them, sometimes on the same RV with multiple slides.
During the mid-twenty tens the Schwintec system was problematic for many users, but I’ve met plenty of folks that claim they’ve had no issues with the system.
Sometime around 2016 or 2017 WBGO replaced the Schwintec slide system with Power Gear Slim Rack slides, also a Lippert product, on many if not most models.
The Slim Rack system has its problems but generally seems better than the Schwintec system.
The Through Frame Slide-Out system seems to be the best of this bunch, but limits basement storage space.
Hopefully someone that owns that year and model will join in and know exactly what systems were used in 2016 on that model.