I installed this shock link from England last week, what a difference... I now ride on magic carpet. Also In my opinion the marzocchi super Z 38 gripX is better than the 38 gripX2, more simple.
Since I installed the 2021 tcu and have been riding with BLEVO, I have also had no loss of support...
And remember, specialized has had a brose with belt system and auto shift for a long time "vado"... who knows if that belt and new brose engine will suddenly come in the levo gen4...
As I have been saying for a long time, the levo gen3 is still the best package! Slim downtube 700w, mullet, best multi adjustable geometry and the best tcu. I think the gen4 package will be great.