So the cable on your phone charger head juts out to the side. You are in a rush, your phone's almost out of battery and you're waiting on that important call back from the clinic. But...your cable either obstructs the adjacent power outlet (so you can't plug anything else into the outlet), or you have to unplug the device from the adjacent outlet so your phone charger can fit in.
WHY IS YOUR LIFE SO HARD!?
A yet-to-be-made ISO standard for phone chargers would likely solve this problem for everyone, but in the meantime, a workaround is simply to install power outlets that are wider than average anywhere you are likely to charge your phone (for example, in the master bedroom or the kitchen).
In other words, don't get get power outlets like this, get something like this instead. Note that whilst power outlets with direct USB charging ports would also solve the problem, they typically only charge at 5v, which means any kind of handy fast-charging function your phone manufacturer's charger provides will be lost.