A point you miss is that the EFKE 25 uses an old emulsion formula which gives results similar to ISO 100 films of today from Kodak, Ilford and Fuji. It is just a matter of testing the film / developer combination to find the best one for your application. Quit moaning and start testing. And, don't forget that most of these modern ISO 100 film can be overexposed at 50 and 25 with very good results.