Interrail is great - we spent 3 month last year seeing all of Europe. But it doesn’t include your country of residence, so visiting the parents on the other side of the state is not an option. And traveling with the cheap tickets and kids is hard - if you miss the train (which just happens with kids) the ticket is void. The ticket is not refundable if plans change. All of these downsides that a car doesn’t have (I still prefer train, but we can afford it). And for longer distances, train becomes hard - we’ve been to Mallorca by train and ferry, but it takes a few days instead of a few hours. And it’s substantially more expensive on top.
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