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It depends on whether you would still be able to buy one at the moment you need it. Purchasing and installing a profile requires an internet connection. If Wi-Fi will be easy to find where you are going, waiting is reasonable. If the route includes stretches where it is not, having the profile ready in advance is clearly the safer choice.

Many recent devices store several, but both the number stored and the number active at once vary by model and OS version. Check the SIM management screen on your own phone, and do not delete an old profile to make room until you are certain it has expired.

It helps to the extent that something lives outside that one device: the copy you gave a companion, and accounts you can still reach from another device. That is precisely why a good plan keeps material off the primary phone. An eSIM profile installed on a lost handset normally cannot move itself to a new one, and has to be discussed case by case.

Only while you are in the hotel, which is rarely when a backup matters most. The connectivity failures that genuinely hurt happen outside, finding the way back or arriving at the wrong station. Treat accommodation Wi-Fi as a supporting layer rather than the core of the plan.

For most travellers the layers that pay off most are the free ones: offline material, a verification method independent of SMS, and a copy of the essentials on a companion's phone. Spending should follow a specific risk you can name, not a general feeling of unease.

Not necessarily. Ordinary leisure trips with hotel Wi-Fi and offline maps are usually fine; work trips with fixed commitments and remote-area travel justify it.

It depends on the plan: some expire a set period after purchase even if never activated, so check before buying one far in advance.