Try not enabling taint in some post-5.26 version of Perl and then discovering that your path in that backticks command was tainted, preventing your script from running.

Sure, let's try that:

$ perl -E 'say $^V; say qq/Taint mode: ${^TAINT}/; say qx/date/'
v5.34.0
Taint mode: 0
Thu 26 Oct 09:57:36 BST 2023

$
[download]

Taint mode is entirely unsurprisingly not enabled and the code inside qx// runs just fine.