I have no link at the moment however, whenever I’ve heard medical experts discuss HIV, read literature on HIV, received advice from GUM, the common narrative is. If you are HIV, take your meds, you’ll have a normal life expectancy. In fact, I’ve watched a documentary, where HIV affected patients, are not even contagious after a couple of months on meds
There are a variety of factors around HIV that cause a wide range of complications. Outcome is linked to the strain you have, the group, and subtype (and this can be broken down further), because the treatments available are not universally effective.
Research has almost universally been done on HIV-1 subtype B, which only accounts for 12% of infections. Whilst you have HIV-1 subtype C which accounts for about half of global HIV infections. Which is why research like this from Sweden is quite concerning.
External Link/Members Only (Virological failure in patients with HIV-1 subtype C receiving antiretroviral therapy: an analysis of a prospective national cohort in Sweden, 2016).
There are also about 90 known distinct mixed viruses, it is very much possible to contract more than one subtype of HIV, and these recombine to create a unique virus.
Now, yes HIV-1 B is the believed to be the predominant subtype in Western Europe and Nothern America, travel and migration is changing that. Also, it's becoming more seen as a result of intravenous drug usage than sexual transmission, which brings in a secondary complicating factor.
So while it is certainly true that it is possible, if you stick to the medication regime, you could have a fairly close to normal lifespan. This is the minority of positive individuals.
And as another poster pointed out, it's not HIV that will kill you, it's the complications from it, which increase in likelihood with age. There the cancers, potential liver and kidney damage from the medication, increased susceptibility to other infections, and others.
One of the common medications for HIV infections is truveda, which is also the PrEP med. It's well known to cause kidney and liver issues. As well as lactic acid build up in the blood. And lessen bone density. All of which will shorten your lifespan or kill you. Not everyone gets them, it's not common, but it's not that uncommon either.
For that minority, if they achieve an undetectable viral load, it is still not recommended by specialists to be regularly engaging in unprotected sex. (It's why sperm washing is offered to sero disparate couples - positive male, negative female - when trying to get pregnant, and even that doesn't completely remove the risk). Whilst it is a negligible risk, it is still there.
TL;DR: there's more than one type of HIV, they behave differently. Literature is actually not that good, and acknowledged as such in the community. Even the meds can kill you. Always wear a condom.