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I travel with work a fair bit to different countries, lots of different wall sockets, I like to travel light so I use my MBP charger (means I can fast charge iPhone/IPP/MBP) and I have a travel adapter kit so that means I take only the wall socket adapter that is needed (instead of another adapter to work with my UK 3 pins).

Then I have 4 cables all USB C -
  1. to lightning for my iPhone X and Beats Pro
  2. to USB C for MBP/IPP (cable that comes with the MBP charger)
  3. to Apple Watch 0.3m (short so less cable to carry/mess with)
  4. to multiport AV adapter (just in case I have to present)
If Apple could standardise on USB C I could drop one cable at least!
 
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