Sal, for example if one only uses a water rinse in between developer and alkaline fixer, it needs to be quite thorough as development activity could restart in the fixer.
Anyhow, my intention here is not to bash alkaline fixers so I apologize if any of it came off that way. I'm merely asking some questions. Statements have been made regarding the working properties of alkaline fixers vs acidic (non hardening) fixers in relation to certain tanning developers, wash times (film and paper), hypo clearing, the general desirability of all-alkaline processes, and fixing capacities. What do we really know? What is it based on?