Charging the battery to 100% regularly can accelerate battery degradeation over time. Charging via a rapid charger at a motorway services from time to time or even letting it charge to 100% if time allows on them odd longer journy’s, isn’t going to cause much in the way of harm. All EV’s have a safety buffer, The e2008 for example has50kWh battery but only 46.3kkWh is useable. A similar buffer will also be at 0%. The e2008 is also capable at charging upto 100kW. Plugging into a motorway services 150kw, your car will throttle the charge and the likely hood your paying over the odds using a 150kW or higher charger. Like @Glos Guy we only stop for a quick pee and were back on the road again to our destination. If I’m travelling alone to my parents three and half hours away, I’ll do my dam best not to stop at all.
The other thing that needs to be taken into consideration is that manufacturers state that a battery shouldn’t be regularly charged above 80% or let fall below 20% if you want to keep it in optimal condition. Therefore if you follow these guidelines for the majority of the time you use your EV you should only ever use 60% of your cars range for the majority of your driving needs.
Like with any other type of car quoted ranges rarely turn out to be achievable most of the time so if you are one of those people who follow the instructions to the letter to prolong car life you are only ever going to get just over half of your cars quoted range at best between charge cycles