Here are some numbers of active devices per Android version (Google used to publish those themselves in the past).
But I have to admit that I don’t like the use of “ridiculously” old. A12 isn’t even on that list yet which makes A10 the second-to-last. Sure, it’s the oldest version to still receive patches. But I’d prefer news outlets to use less extreme vocabulary, even if it’s true that there are too many devices with outdated (as in “not patched anymore”) versions out there.