The claim "increased safety" is rather ironic in light of the post you're commenting on.
The post I commented on is a single anecdote where no one was even remotely hurt. These things collectively have millions of miles on them. If you want counter evidence I can show you one of a billion anecdotes of terrible drivers.
"Decreased cost" will only be true as long as they still have to compete with human drivers.
I meant to the provider, not the end user.