This is the UK definitive advice including that on the need to be able to reverse:If France has in place legislation like Spain does then it's illegal to use an A frame as it is in Spain.
It is entirely possible to reverse a mechanically set up A frame equipped car I know this as I have one and can do. Do you ? Yes it's tricky but entirely possible if one takes the time to practice. I mean we all have to learn ?
Anyone who has towed a goods trailer fully partially or empty will agree that a car on an A frame with a wheel at each corner is far far more stable. Fact.
If I have to point out again that unless legislation is in place to stop regulate or ban the use of A frames is in place it is entirely legal by default just like millions of things we can do. This is NOT tolerance it is because it's absolutely fine and perfectly legal to do so there is no grey area.
The users of A frames are defending against a number of folk who see fit to offer complete rubbish every time the subject comes up saying the same crap time and time again. Frankly it's sickening but perhaps they have such boring lives it entertains.
As for being unfair that's just daft. Hissed off yes and to the point where my tenure in motor homing is currently untenable.
https://www.gov.uk/government/publications/a-frames-and-dollies/a-frames-and-dollies
I have reversed a caravan with no auto reverse system (at one time they were all like that unless you left the car to apply a lock) and yes it is possible but only just and only under ideal circumstances. Not every time, not when you need to most, not on a pot-holed road, not uphill, not on grass, etc. Stability? It's hard to improve on the perfection offered by a single axle car trailer behind a motorhome but maybe a car with unsteered front wheels reliant on caster to keep it in line is better. I don't know. Neither do I know why I continue this discussion - it has been done to death and I still don't really understand the disagreement with the stuff I came up with in the last post. It was factual (with the possible exception of my use of one word) and doesn't disagree with any official information on the subject.