I generally favor multi-factors. But I don’t know, maybe reduced stigma is the lion’s share.
And then, it’s like anything. If you’re interested in something and you’re looking, you will see more.
The newer term UAP, which means Unidentified Aerial Phenomenon, is both:
1) a mealy-mouthed term designed to take the edge off, and
2) more accurate, because if it’s something like ball lightening or esp. if it’s an high-altitude light reflection phenomenon, for example, then it’s not really an object.