Opinion on people insisting that Pluto is still a planet?
They’re nutcases. Astronomy isn’t about emotional attachments to icy space rocks. They should be glad that science had progressed to the point where we can make these distinctions and categories. What would people think if I said “Aw, birds aren’t mammals? That’s terrible. It’s okay bird, you’ll always be a mammal to me.” These categories hold no intrinsic worth; a mammal isn’t worth more than a bird simply because we are mammals, just like a planet has no more scientific worth than a dwarf planet simply because we live on a planet! And it goes against all science to personify unhuman things and willfully ignore scientific classification.