Does ART work?  Some mixed findings from here in the UK.  Perhaps the
most interesting points are that half of those who died had CD4 counts
over 200 and almost a third had undetectable viral loads.

<http://www.aidsmap.com/en/news/8DB0098A-5707-4F4C-84FA-AE9C854865F6.asp>:
"One-in-three deaths that occurred in HIV-positive individuals in the
United Kingdom between 2004 and 2005 were not directly related to HIV,
according to the final results of the British HIV Association (BHIVA)
mortality audit presented at BHIVA's Autumn conference, held last week
in London. The audit also found that cancers related to HIV, as well
as those traditionally not related to HIV, accounted for more deaths
than any other cause. Other major non-"classical" AIDS-defining
specific causes of death included liver disease due to hepatitis B/C
co-infection and/or alcohol, and cardiovascular disease.

[...]

However, since the number of HIV-positive individuals is constantly
increasing, the proportion of deaths is actually falling.
Consequently, only around 1% of all diagnosed HIV-positive individuals
actually died in 2004.

[...]

CD4 and viral loads in the last six months of life were not uniformly
poor. In fact, around half of all people who died had CD4 cell counts
above 200 cells/mm3 and 30% had 'undetectable' viral loads. Consistent
with these data is the finding that one-third of deaths were not
considered to be directly linked to HIV infection.

[...]

Patient factors leading to death included poor adherence (26, or 6.7%
of all deaths); declining treatment (18, or 4.7% of all deaths); and,
in two cases, poor HIV clinic attendance or lack of regular care.

[...]

Conclusion
Along with late diagnosis, causes not directly related to HIV account
for the majority of deaths in adults with HIV. Deaths due to adverse
reactions to HIV therapy and to running out of options with multi-drug
resistant HIV were, according to Professor Sebastian Lucas of St.
Thomas’ Hospital, London, who presented the data with BHIVA’s
President, Professor Margaret Johnson, reassuringly rare."