Thanks for sharing. Someone already posted a summary of this study on Wikipedia's page about the
Hoabinhian.
As of 2022, only two ancient DNA samples have been extracted from individuals excavated in Hoabinhian contexts: one specimen from Laos (c. 7,800 BP) and one from the Malay Peninsula (c. 4,200 BP). While the Upper Paleolithic origins of this 'Hoabinhian ancestry' represented by the two samples are unknown, Hoabinhian ancestry has been found to be related to the main 'East Asian' ancestry component found in most modern East and Southeast Asians, although deeply diverged from it.[14][15] When compared with present-day populations, the sampled ancient Hoabinhian individuals are genetically closest to the Semang (also known as "Malaysian Negritos") and the Maniq in the interior of the Malay Peninsula, and to the Andamanese Onge and Jarawa.
The emergence of the Neolithic in Southeast Asia went along with a population shift caused by migrations from southern China. Neolithic Mainland Southeast Asian samples predominantly have East Asian ancestry related to ancient populations from southern China, but many of these samples also display admixture with Hoabinhian ancestry or Hoabinhian-related ancestry to a smaller degree. In modern populations, this admixture of East Asian and Hoabinhian (or Hoabinhian-related) ancestry is most strongly associated with Austroasiatic-speaking groups, and can also be reproduced in models where Onge samples are taken as proxies for Hoabinhian ancestry.
So it looks like the Neolithic population of Mainland Southeast Asia was very different from today and related to minority ethnic groups that survived in the region today like the Semang and the Maniq.
These people are very probably descended from the first human migration Out of Africa that carried Y-haplogroups C and D to South(east) Asia and Australia.