After talking to Pas and googling, apparently Pokeradar has a new chaining "tier" of sorts.
At 40 streak, the shiny rate was thought to be maxed out, and pokemon had 2 guaranteed perfect IVs. By extension, the Friend Safari functions like a constant 40-streak.
However, at 60-streak, the amount of perfect IVs becomes 3 instead, which is interesting. The shiny rate might also be even higher in that case.
Of course, the problem is even reaching a 60-streak
At 40 streak, the shiny rate was thought to be maxed out, and pokemon had 2 guaranteed perfect IVs. By extension, the Friend Safari functions like a constant 40-streak.
However, at 60-streak, the amount of perfect IVs becomes 3 instead, which is interesting. The shiny rate might also be even higher in that case.
Of course, the problem is even reaching a 60-streak