Great article. Just reading about GVT has me flashing back to 10x10 squats and leg curls a few years ago. It was a brutal training program, but so simple and effective. While I haven't run GVT for a couple of years now, it's still been my go-to if I want to ramp up my training in the gym in the past.
I find 531 or 5x5 to be easier to maintain year-round - they keep strength ticking along and fit in with cardio when I want to make that a higher priority. The studies you refer to are interesting and I wasn't aware of them, so thanks for sharing.
GVT might be back on the menu in 2022!