The use of EIFS with drainage started in the '90s as a result of the idea that incorporating some sort of drainage capability into an EIFS-clad wall would help solve water intrusion problems on wood-frame buildings.
This seems a bit odd because it infers that adding drainage to EIFS alone will solve the problems of a leaking wall assembly. Clearly, drainage is only part of the solution. For instance, what about flashings, windows, sealant joints (or lack thereof) and so on?