It’s not too late to get a mobile friendly version and avoid the pending google rank penalty for a non mobile friendly website.
In fairness Google has given all and sundry plenty of warning and it’s not usual practice for them to do so. However it has been welcomed far and wide and many businesses are now fully responsive or have a mobile version of their website. So what can happen if your website remains non mobile friendly? It will drop in ranking and it will affect website visits and online sales or enquiries.