Usually you want these solutions to add directories to the path, not just overwrite the current list with a new list.

As noted in the threads you mentioned, some versions of some operating systems notice that perl is exec'ing perl (itself) and then avoid repeating some of the work of loading dependencies. This can lead to this solution still not working.

That is why some of the solutions previously provided did something like:

    exec "env", $^X, $0, @ARGV
    #    ^^^^^ have perl exec env that execs perl
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