It is just not Darwin’s world any more.
Darwinian evolution, which most lay hearers assume to be “evolution” period, assumes that evolution is vertical.
In the history of life, some forms survive while — or even by — losing information.
To the extent that epigenetics casts doubt on simplistic Darwinian or other schemes of evolution, its main role may be that of “spoiler.”
Anything HGT does, Darwinian evolution did not do.