[Prolixus]

Accents have been on the way out since long before Siri. When TV decided the “normal” American accent was midwestern all other accents were on a ticking clock. Every generation is exposed less and less to their regional accent and more and more to the midwestern. Mass media does that.
Yep, I am no longer able to speak with my native (Boston) accent and my born-in-Boston son has never had one. Funny thing is, my from-somewhere-else neighbors think I have a strong accent. The fact that they can understand anything I say tells me I no longer have a strong Boston accent ;)

[SkyPilot]

I lived in Boston for 4 years and I think this is pretty dead on:

https://www.youtube.com/watch?v=rLwbzGyC6t4