<snip>
ESPIE beats everything. That's the point. If (a.) all you need to trap is 
program checks; and (b.) you expect a bunch of them -- use ESPIE. 
</snip>

I'd say "If ...you expect a bunch of them" then make every effort to 
redesign your application. Because "no program check" can be thought to 
beat ESPIE by even more than ESPIE beats other forms of recovery.  I'd 
also say "if you're actually interested in debugging, you're much more 
likely not to want to use ESPIE". ESPIE was intended for 

FWIW, as Binyamin noted, ESPIE can be used only for problem state 
programs.

Peter Relson
z/OS Core Technology Design


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