in reply to Any downsides to this slurp idiom?
That reads pretty cleanly to me .. you're slurping an entire file into a scalar. But then I've been around the language long enough that I recognize what you're doing. When I'm unsure if someone else might not understand a line of somewhat tricky Perl, I just put a comment above the line, then move on.
PS: You could also use autodie; to make the code even shorter.
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