Seems like there are two very different modes of development being mentioned here. You seem to be describing a mode where you just need to concentrate and bang out your lines of code for the day. The previous comment seems to be referring to creative, collaborative development. The industry probably needs both, but I’m much more personally interested in the latter, and I’m worried that async/remote is disastrous for that mode in ways that might not be realized for years. To use a crude example, if you’re in a rock band composing songs together, you would never consider that suggesting a change to the riff the bass player is playing would be “an interruption that cost them 20 minutes of focus.”