Just curious -- have you personally confirmed this?
Not trying to cast doubt... just noting that I have exactly the same feelings (hopes?) but I have yet to personally confirm it, in large part because it's not yet fully GA so we haven't jumped in with our production workloads.
Also, vert.x are already exploring how to adapt to the new threads model. (2)
1 - https://gist.github.com/vietj/fe9f886d489853ab07111ba5715b13...
2 - https://vertx.io/blog/vertx-virtual-threads-incubator/