does anyone know of good write-ups/presentations of PLO and its 
capabilities and uses for an assembler programmer who knows how to use CS 
and CDS.

My hope is that, going forward once you have a machine that supports it 
and, for those who care about z/OS under z/VM, once/if it is supported for 
z/OS running under z/VM, no one ever uses PLO again but instead uses 
transactional execution, particularly TBEGINC for the simpler cases. 

Peter Relson
z/OS Core Technology Design

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