the specimen referred to is an unborn thylacine foetus and the alcohol also had formaldehyde which had destroyed the RNA and left the DNA fragmented, unstable and unsuitable to complete the sequencing. Of course there has been advancements in technology and with the aid of AI perhaps the researchers have reached 99.5% as mentioned..it will be interesting to hear their final findings in a pub;ished peer review paper and public statement.
(There have been numerous sightings over the past 90 years including distinctive paw prints, scats/spoors containing confirmed Thylacine hair by The Tasmanian Museum, no clear video/photographic evidence to corroborate, in 4 main areas of the state of Tasmania, namely Scotsdale, Helyer Gorge, Central Highlands and Lune River.).
IMHO they're alive and well in small pockets. They are extremely shy and elusive.