The problem with most people's comprehension of Matthew 16:28, is most haven't understood Yehoshua called Simon "petros" (a small pebble/stumbling stone) only once in the Synoptic Gospels, to fulfil Zechariah 3:9, Isaiah 8:14, as Simon was Pharisaic, and Yeshua knew he'd joined the Sanhedrin to make up Christianity.
When 'Satan Stands' against Yehoshua in Zechariah 3:1-2, he called Simon "Satan" for rebuking him, and when Matthew 16:28 says 'that some Standing here shall not taste death, until the coming of the Kingdom', it is about the Pharisaic Christian Church, that they created opposite to Yeshua's teachings.

So the prophecy was accurate to the letter, people just don't read very well, and Rabbis have rewritten much of the contexts, where scholarship then uses their lousy standards.
So for example Zechariah 3 according to them is about Yehoshua son of Yehozadek - when it doesn't mention his name there, it does in Zechariah 6, and they've assumed it is about after the Babylonian Exile, when the contexts doesn't match (as Zechariah 3:1-2 is to cut off Jerusalem).