Regarding the overall scope of the layer system, I have now read and learned about so many different varieties. And I'm sure it's just the "tip of the iceberg" as you have pointed out. There's the max strength version, the ramp/cluster/hdl method, the method involving complexes, and now the "density" method that was brought up recently.
My question is in regards to the exercises performed. I have followed a 6 day split for some time now, with days being SGHP/Incline Tilt/TBDL/SGHP/Decline Tilt/Lats & Bi's/off/repeat. I see so much variation amongst the different types of layers that, to me, it looks like you could keep the main exercises the same for an entire year or so and continue to overload and stimulate new growth.
In your opinion, is the change of main lifts or the actual change of load %/intensity/volume more critical to progress? I am very happy with the main lifts as of now and do not get "bored" on certain days as some others have expressed.
I see no reason why the main lifts couldn't stay the same for an extended period of time and still see progress. To me, the longer and more you perform a certain lift, the better, stronger, and more resilient you will become with it. IMO.
Thank you for all you do!