I posted the article Centralised DoH is bad for Privacy, in 2019 and beyond to HN nearly a week ago [1].

Here’s the money quote:

DNS over HTTPS however neatly separates out each device (and even each individual application on that device) to a separate query stream. This alone is worrying, as we now have individual users’ queries, but the TLS that underlies HTTPS also typically uses TLS Resumption which offers even further tracking capabilities.

[1]: https://news.ycombinator.com/item?id=22362864