Yeah this is the part I don’t get. It seems like people are talking about 1 distinct app = 1 container and this is the new normal? We’re back to managing cows instead of cattle again?

What on earth needs thousands of instances? Are you building a CDN? Most apps can be a single server or sharded by business/region.

Honestly, this whole leys run loads of nodes seems to have sprung up from languages that are slow oe don't have decent concurrency.

That's the whole thesis; YAGNI.