What it is
This is Europe's answer to the small motorhome, and it works because of the infrastructure: low-emission zones, narrow old-town streets, and campsites built into the village. A 5 m campervan can be parked outside a Roman wall and be entirely fine.
Why people choose it
Confirm the licence before you buy. In the EU a category B licence covers a vehicle up to 3,500 kg and 8 passengers, so if the real operating weight exceeds that you need a heavier class. Many campervans are registered just under 3,500 kg, which is a legal limit rather than a coincidence.
What to check before you buy
The weak points are water capacity and insulation. A European campervan carries 40–90 litres of fresh water, so plan on paying for a pitch supply on longer stays, and check the insulation if you intend to travel in winter.