There numbers do seem to be dwindling of late.
It may seem so, if you're looking in the wrong places, or have the wrong expectation of what you're looking for. As the Karmapa said, "they're not going to look like me." Remember the Tibetan tale about the humble practitioner who runs into a bodhisattva on a mountain path, and receives the great blessing of enlightenment from him. Farther on the path, the man meets a woman and asks, breathlessly, if she saw anything unusual recently. And she answers, "Oh, you mean that mangy rabid dog who passed by? Yes, I gave him a wide berth." Bodhisattvas can disguise themselves as the most unlikely people. It's a measure of our attainment whether we have the discernment to recognize them when we see them.