While I am looking forward for Julia 1.0 like I am sure everyone else here, I believe it is far better to wait some more time instead of leaving open issues such as inefficient Union types etc, which would influence packages development and therefore would be much more difficult to get rid of after 1.0 release.
Maybe while the new optimizer is developed there could be some more time to reconsider some minor language glitches such as this one or others which may have been postponed after 1.0 release due to time constrains.
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