When I need to share global things, most of all I want it to be maintainable. I put all of the global-things into one module with "getters" and "setters" to access them, and those subs are
suspicious, checking for errors such as references to non-existent variables or attempts to set a value to the wrong data-type. I want all of the logic that actually sets or returns these values to occur in only one module – this one – and if something is wrong, anywhere, I want to see an exception being thrown such that I can get a traceback that leads me directly to the source-line where the otherwise-unfindable problem is. There are good CPAN modules to help ... the most obvious one being Moose or any of its lighter-weight cousins.
I also don't want things to be loaded
dynamically, as in
do, unless there is a compelling need for it. I literally want to know what the executing source-code consists of at all times, so that I do not have to be concerned whether a particular module had been "done yet" or not.
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