Which is why you take the position you take. It suits your already determined conclusion. Compare Mark 16 with Matthew 28 and while quite similar Mark goes way off from Matthew and opens the door to some very strange behaviors.https://en.wikipedia.org/wiki/Mark_16
A very thorough explanation of every manuscript with and without the long ending. After reading through this information I am even more confident than ever that it belongs. Some of the blank columns in the other manuscripts might mean something. It was accepted as canon very early on. Probably for the same reason we do today. The Spirit bears witness with our spirit that it is the Word of God. It only irritates those who reject the idea that all believers will speak in tongues. That is probably why it is missing from the manuscripts it is missing from.
For the cause of Christ
Roger