I agree. I read an article a few months ago about how frequent MAID (medical assistance in dying) is in Canada. I am surprised that that has not led to larger scale studies about the dying process.

In this particular case, the press release notes "Scientifically, it's very difficult to interpret the data because the brain had suffered bleeding, seizures, swelling...". That does seem to limit how much can be generalized from this one case. A larger study of MAID patients would be more useful.

Edit: Maybe the issue is that the MAID itself would alter the brain state. That actually seems pretty plausible.