This issue seems to only be getting worse, and we have not seen what SE intends to do about this. I somehow do not believe anything presented as the context for this post and I am more inclined to believe that SE made a poor choice in hardware again.

Put us back on lower concurrency to test this, and I bet lag goes away.

Since the start SE has dropped the ball and continually tried to grab "hanging fruit" reasons for problems and it's utterly disgusting. Stop with the apologizing, stop with the promises, and get reliable tech partners.