That's true, but accepting that all life shares a common ancestor doesn't help the medical profession fight super-bugs, imo. The common ancestor thing is an irrelevance.
scientifically, we came from eukaryote super groups, a group of cells.
this comports well with what glansdorf says, and he also said HGT wasn't as prevalent as some has assumed.
i believe HGT was prevalent during pre eukaryote super groups, but rare after.
this explains why almost all eukaryotes have abundant bacterial sequences.
eukaryote retrortransposons is probably the result of pre eukaryote HGT transfer.
all of the rest of eukaryote HGT events was most likely the result of natural genetic engineering.
i'm positive there is yet more to be discovered however.
the possible transposon code and molecular language for starters.
i'm quite confident DNA utilizes a sandbox concept, how else can the cell engineer genetic sequences without upsetting the cells functionality without such a concept?
no, evolution isn't darwinian.