Apparently people switching to non menthol are dipping them in dilute menthol liquid or painting it on or using what look a lot like the clove “spikes” that made the rounds when kreteks became illegal. If this follows the trend of cloves though interest will die out in a few years.I don't know.
Just guessing, I suspect some will switch to non-menthol. Those who live close to state borders will probably make the trek to other states to get their menthol cigs.
Perhaps, and hopefully, it will drive some to vaping. Maybe some will quit altogether.