-E already has the behavior of enabling the feature bundle of the current Perl version. It does not enable strict, and so I would suggest it should not enable warnings or utf8 either (as mentioned in the post, -M7 can be used to apply whatever use v7 may end up entailing).
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For one-liners, it would be good if
-Eautomatically enabled all the "positive" v7 features by default.-ewould still be backwards-compatible.-Ealready has the behavior of enabling the feature bundle of the current Perl version. It does not enable strict, and so I would suggest it should not enable warnings or utf8 either (as mentioned in the post,-M7can be used to apply whateveruse v7may end up entailing).