Am I missing something here?

I'm no medical researcher, but I've previously questioned how these studies of how long HIV positive patients can expect to live if they are being treated can be all that accurate.  Don't you have to wait 'til the (say) 20 year olds who have started on antiviral treatments in the last decade have lived on the drugs for 40 years before you can know of any long term consequences of such intense medication?

Here's news of another such statistical study, saying that if they get onto treatment early, they can expect to live near normal life expectancy.  The article says:

The researchers looked at 88,500 people with HIV from Europe and North America who had been involved in 18 studies.

They based their life-expectancy predictions on death rates during the first three years of follow-up after drug treatment was started.

They found that fewer people who started treatment between 2008 and 2010 died during this period compared with those who began treatment between 1996 and 2007.

The expected age at death of a 20-year-old patient starting antiretroviral therapy (ART) after 2008, with a low viral load and after the first year of treatment, was 78 years - similar to the general population.

Furthermore, publicity about this type of finding surely is (the major?) part of the reason for complacency in the at risk community about catching it in the first place.?