I use it in production code. The benefit is good enough for me that I will hold back an upgrade of Perl to keep using it, if needed.
Either way, there's already patches for compile time support in 5.9 which does not use pseudohashes. If it gets merged (and it better), 5.10 should keep the same support, and i think that's a long time from now.
At the bottom line, nobody in their right mind will take away this feature, especially from a languge whose motto is There Is More Than One Way To Do It. The worst I can foresee is that it might change a bit.
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