I finally bought it and it’s on its way. At $569, it was a hard sell, as I waited nearly a year before deciding its value overcame the price tag for me. The Fujifilm EVF-TL1 viewfinder tilt adapter for the GFX 50S and GFX 100 is attached between the removable electronic viewfinder and the camera body, allowing you to tilt the eyepiece up to 90⁰ upward to use the camera in a waist-level/chest-level viewfinder mode or pitched ±45⁰ when in portrait orientation. It gives the EVF far more versatility to be used in awkward positions where you'd normally have to resort to using the 2½-way rear LCD.
Beginning with a Fujifilm X-T20, a cold, wet November hike to photograph Twin Falls enlightened me to the benefits of a weather sealed camera. It was then durability surpassed convenience in priority and I bought my Graphite Silver Edition X-T2. 90 days later, I feel I’ve spent enough time with it to render a proper judgment, so here’s my own review of what I’ve experienced and ultimately learned.