Will EU entry-exit system impinge on my travels?

Q I travel fairly frequently from the UK to Costa Rica – changing planes in Paris or occasionally Madrid.

- Section 2/ Ask Simon Calder

If I understand correctly, as I don't actually enter France or Spain, I won't be involved with the EU entry-exit system. They don't usually stamp my passport at the transit airport. I want to be fully prepared; I have a US Esta and a Canadian eTA to cover me in case my plans change or I get diverted. I think it's always best to be prepared, and I will get an EU Etias when they come out. A Paris CDG and Madrid are two of the key hub airports in the European Union, alongside Amsterdam and Frankfurt. At these locations the aim is to allow passengers travelling between tw