YES!
and No.
Not smoking changes your sleeping for the better in most cases (less sleep required) but conversely using Nicotine will stimulate you when you don't want it to.
So, the question is what are you trying to achieve? If you are sleeping too little and feel tired you need to avoid Nicotine in the same way people avoid other stimulants into the late afternoon/ early evening.
If you don't actually need the sleep (getting older etc, having a more healthy respiratory system) then celebrate that and plan accordingly.
Vaping nicotine can easily cause insomnia but so did/does smoking - only when people smoke they are gradually making themselves more and more unwell therefore needing more sleep.
It sounds like a catch 22 but it isn't. I know so many people who have had to work on this. If I forget to use low Nicotine in the evening I pay the price every time. It's as predictable as you can get.
You know what to do.
