I’m sitting here stoned and pondering. What would happen if you had grain jars of different strains of cubes and mixed them together with a bulk sub? A lot of cubes look so similar that it could be hard to tell apart. But let’s say gt’s and pe’s were mixed in same sub. Would the mycelium still merge together? Would there be patches of different strains?

What would happen?

That depends on different factors. Different strains can mix and crossbread, but sometimes one strain can be just a lot "stronger" than other strains, and then it will just dominate the others.