Don’t forget about the Simchas Torah versions of “ka’eyleh” – the end of each aliyah at the laining of ST night. It seems to me that “V’heim alfei Menashe” is an even bigger, more prominent ka’eyleh event than Ka’eyleh itself. Any good baal koreh knows to pause right before these words.
I have heard that a certain adam gadol used to be the rov at one of the sleepaway camps. He would say Shema with the trop, and since he’d finish after everybody else, everyone could hear him laining the last part out loud. When he would reach “V’lo sasuru” the entire camp, or a large portion of it, would sing it together, out loud.