It is in the format of a chat log. A man's consciousness was uploaded to a computer to save him. Now in the future, they downloaded his mind into a body, but the man gave permission for scientists to copy his consciousness and talk to it through a computer. The scientist on the computer is excited because he finally found a version of the consciousness that is stable and lasts more than a few seconds before going crazy. Does this short story sound familiar to anyone?
It sounds very similar to "We Are Legion (We Are Bob)", which is a story about a guy who gets cryogenically frozen after death. A few hundred years in the future, he's revived (his consciousness is transferred to computers/machines). The doctors there tell him that this process (putting his consciousness into a machine) is dangerous and that some of the people who this happens to go mad/can't handle it. I believe that one of his 'forms' is blown up and the scientist/doctor uses a back-up and puts that into new machines.
Where it strays from your description is that eventually the protagonist is sent out into the solar system on a quest for worlds that can sustain life.
This might be it. It was for me anyway and this question was one of the only things I could find that came even close.
- not quite a chat log, but is written as a personal log!
- a consciousness is uploaded, though not to save the man, it is simple impatience and desire to push the human boundary I feel.
- somewhere in the future the mind upload becomes embodied again.
- at first the other people on the team talk to the mind upload through text / audio on computers.
- at the start it is mentioned that the host usually dies when trying to map the mind but their company is the first to have done it.
It does sound familiar. I found a similar story during my search. "Lena" by qntm and Sam Hughes, is about a neurology graduate Miguel Álvarez Acevedo whose consciousness and experiments thereof comprise the bulk of the story. The story reads like a summary report on the topic in the style of a Wikipedia entry.