Looks like it is very possible for the Dalai Lama to live up to 90 or 100 years of age. With His longevity of life, it is proven beyond doubts that Dorje Shugden cannot do harm to Him as He has claimed to be so.
Placing the evil dalie where he belongs, the garbage bin of history, would not harm but rather benefit him. But even a supramundane protector such as Dorje Shugden cannot do anything about it, as long as Shugdenpas themselves show servile subservience to the evil monster.
As so many here have commented, enlightened beings like the Dalai Lama cannot be harmed by evil spirits.
Being an evil spirit himself, the evil dalie requires no one to harm him. However, some Shugdenpas are harmed by the evil dalie, because betraying their refuge in the Three Jewels they take refuge in the evil spirit, the monstrous dalie.
So one of the main reasons for Dalai Lama to impose the ban is baseless.
And what is even more baseless is Shugdenpas servilely submitting to the evil dalie's authority, and then complaining about it!
Another view to consider which I do is that Dorje Shugden is not a evil spirit but AN ENLIGHTENED BEING AND AS SUCH IS NOT CAPABLE OF HARMING ANY BEINGS. This is the valid conclusion to debunk the calling of Dorje Shugden as a evil spirit.
You should consider better your own correct view, and therefore abandon subservience to the evil dalie.
I rejoice that the Dalai Lama may live to 90 or 100 years of age, but then do we Shugdenpas also suffer the ban for another period of over 15 years or so. That I feel is not fair and totally nonsense.
What would you expect, since many Shugdenpas are so subservient to the evil dalie? As long as this situation remains, the ban makes perfect sense.