HPC is dying, and MPI is killing it
I enjoyed this piece when it came out in 2015. I think it's worth a read for those who haven't seen it before. The previous HN comments are at https://news.ycombinator.com/item?id=9335441 . There's also a followup essay at http://www.dursi.ca/objections-continued/ .
Looking now, I see the author discussed the topic further in a podcast at http://www.rce-cast.com/Podcast/rce-97-jonathan-dursi.html . I have not yet listened to it.