Whether it's a loading bar on the google play store, the metronome on a guitar tuner or the progress bar of an offline audio player downloaded from F-Droid... everyone seems to have adopted the squiggly line loading bar seemingly overnight, and I can't fathom why, as it can be really distracting at times to have multiple moving things on screen.

I can understand wanting to renew the look of an otherwise boring loading bar on the app store, but does a music player really need to have a progress bar with a wave animation? Is this a new trend or design choice in the tech world? It's driving me insane...