Johan Mabille

Yes the old connection pattern will still be supported (but marked as deprecated).

> Hi Johan, I feel I owe a response here and I apologize for the delay. I've been even worse, sorry for that! > Requiring all kernels to be updated...

> `The devil is in the details`. I totally agree, that's why I precised *implementation* detail; we should focus on the specification only. What I meant is as long as...

https://github.com/jupyter-xeus/xeus/pull/363 introduces a new `get_starting_message` and deprecates `print_starting_message`

@IsabelParedes sorry I missed your comment, `get_started_message` is indeed a typo. Both other options are fine with me, I let you pick up one ;)