This is not out of jealousy. Just as the stream of digital photos filed on Facebook and Instagram are designed to provoke FOMO (fear of missing out), most of the great paper missives were written with this aim.
But the resentment comes from what it represents. It's a reminder of that generally held axiom that there are no more blank squares on the map.
You will eat the same food at the same chain of restaurants you could at home. Any souvenir can be picked up at the local shops or ordered online and delivered to your home at the click of a button.
We are living in the age of the jet engine and fibre-optic cable. The phrase "wish you were here" has gone out of fashion for the very real danger that the person you're contacting may just turn up.
Snail mail may be outpaced and outmoded but it delivers a powerful message. It laughs in the face of progress and these assumptions. It is a reminder that we are living at a point when the planet is now more diverse than at any time in history. And just as difficult to get around.
Unreliable, prone to delays and the physical jeopardy of the journey home, the postcard is a testament to the long way round. Things you miss out on, blinkered by the magic portals of smartphones.
It may be delayed by snow, migrating bull elephants, public holidays you never knew existed — held up by the oddities and nuances of the boundaries where postal systems meet.
Eventually arriving — weeks maybe months later — as a herald of foreign stamps and postmarks, stains and smells. It is a reminder of quite how much there is still to see and the very real distance between them.
Now that's worth writing home about.