Actually... why not?

Now there's something that bothers me:
using PFA address of a variable seem to
have actually only advantages; I don't
see any disadvantages.
So why the compilers won't work this
way? I mean: when a variable if found,
instead of its CFA - 'LIT PFA' should
be compiled directly. When a constant
is found — 'LIT <value>' should be compiled,
instead of constant's CFA.
Do I miss anything, any eventual problem?
At the moment I don't see any. It should
work properly in every situation. Yes, the
compilation will be a tad slower - but
the execution speed can be significantly
increased.
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