This is utterly nonsense. I'm even a basecamp subscriber (used in small side projects). Many have requested GANTT charts be added to basecamp, but jason et al. don't use them in their pm process so they refuse to ever add them no matter how many people request them. I know several companies that have been unable to use it due to this lack of a feature. It's not that we like GANTT charts, but there is a BIG difference in project management between a small design shop (ie 37 signals, most yc type companies, etc.) and a large regulated proprietary engineering company (like my current employer).