There have been many sightings and footprints found of Bigfoot, too. I live in the Bigfoot sighting capital of the world and new sightings are routinely reported. If the “Portland” in your name is in reference to the one in Oregon, you do too.
The last widely accepted sighting of a wild thylacine was in 1933, nearly a hundred years ago. Even if any tiny, isolated pockets had managed to escape extermination (which is unlikely on an island without much mountainous terrain or dense forest, especially when everyone and their grandma was out hunting them for the bounty the government put on their tails), they’d be in big trouble owing to genetic drift by now. You always hear people say “I know what I saw,” but do they really? It makes me circle back to the Bigfoot thing. At least some of the people who claim to have seen Bigfoot genuinely believe they really saw him.