Sure, those are good examples of negatives, but that is just the way of it. This happens all the time when new technology emerges. Just think about the audio industry, all of a sudden people could produce music from their spare bedrooms- jobs weren’t needed anymore. But the music industry is now far more saturated than ever as a result, as it is so much more accessible to people, without the need for specialist equipment and stacks of cash.
I’ve always thought phase cancellation technology could potentially be crazy revolutionary. Seems these guys know what they’re doing, but the real challenges come with high decibel levels if I remember right.
If you tried to phase cancel out the sound of a jet engine, it would work and you wouldn’t hear it, but you could also have easily just burst your eardrums too, because the sound pressure level is still present, even if the actual sound is inaudible. It’s a crazy phenomena.
Edit: the sound pressure level IS cancelled out by destructive wave interference, but if this is knocked even by a matter of milliseconds, the wave is doubled and that’s not good for anyone.
Also, on retrospect, phenomena was poor word choice. It’s physics.
Currently in Tokyo from UK, paid for an Airalo esim before I arrived, and I was pretty impressed with how cheap and easy it’s been- and that’s with 20gbs data, which I’ve barely used.
My service provider O2 would have charged me £7 a day with their O2 travel bolt-on, but would have still been my usual contract of unlimited calls, texts and data, just that the data would have been throttled a fair bit. This is a lot more reasonable than it used to be, but still would have amounted in a large bill compared to the one off $18 esim.