Lots of BBs and crancks for square-taper. As sivat very correctly said, the vast choice of widths will allow you to adjust the chainline straight.
When Shimano had the bright idea to go with Octalink, we had suddenly Octalink V1, then V2 and somewhere in that time, also ISIS. A LOT of interfaces all came out in a short time. Then it turned out that the bearings on those BBs lasted way shorter than with square taper (less space for bearings in the new cartridges), so they had to put them outside.
Feels like VHS vs Betamax all over again, in a way. Or HD-DVD vs Blue-Ray. I'll wait this one out, thank you very much. In the meantime, I standardized on square-taper.