[RedDevil]

If you go on a long trip you plan the stops at charge points.
You need breaks anyway. You only lose time when you need more charge than you need for your own convenience.
It is up to you to decide if the beyond-your-break lost time is enough to make it worthwhile to either hire another car for the trip or to buy/build, maintain, insure, store, etc. a pusher trailer.

If I had a first gen EV and wanted to take a very long road trip I'd hire a gasser for it.
If I had a Tesla or other 40kWh+ EV I'd take that and just accept the charge times on the way.
I don't want a trailer on a road trip. I have taken a road trip with a motorbike on a trailer. It tired the hell out of me.
Practically it will reduce your options for parking and the speed you're allowed to travel at: 130 km/h without, 80 with a trailer.
If I would choose to do 80 km/h I can do that in an EV too; that would stretch the range quite some, so when it finally needs charging I would really need a long break.

In my case, with our legislation and charging points everywhere, a pusher trailer would not be useful at all.