The Schwarzschild solution of Einstein's field equations clearly shows that a far away observer sees time slow down for an in-falling object. Relative to him, it takes an infinite amount of time for the object to reach the event horizon. But all black holes evaporate by Hawking radiation in a long but finite time. So wouldn't the observer see the BH completely evaporate away before any object reaches its event horizon?
What would an in-falling person experience? In a very short finite proper time, he would expect to reach the event horizon. But since the BH lost mass, the event horizon would have shrunk. It would keep shrinking away from him, until its radius is zero and the BH is gone. Would he see an explosion at this time and then be in free space in the far future?
Considering time dilation of particles collapsing to form a BH, it seems that neither an event horizon or singularity could ever form in a finite time. Astronomical BHs would really be concentric shells of matter that have almost, but not quite, shrunk within their Schwarzschild radius. Does this seem reasonable?
