We have received reply from Electrum author. Plugin won't be included in wallet by default. Author believes it would create a law risk to add mixer into wallet. Our hook was merged so our plugin will work with new version, but it will need to be installed separately.
We have published an article at r/Bitcoin about how to use ChipMixer to avoid upcoming "declare cryptocurrencies" US law:
https://www.reddit.com/r/Bitcoin/comments/6jzc41/easy_way_to_avoid_upcoming_us_declare_btc_law/Just saw this update.
Even though it's not included in Electrum by default, at least there is somewhere to download it! So good job devs of Chipmixer, we all appreciate your work and trying to improve the user experience of bitcoin in general.
Using a mixer isn't being paranoid, it's simply one extra step for anyone trying to track you down to go through. It won't give you perfect anonymity but it will be light years ahead of the anonymity bitcoin provides. Chipmixer is a great way to start if you haven't used their service yet, it's quite newbie friendly, and it's free too.