Is 24-105 obsolete in 2024?
Ok, a good lens is never obsolete, but with this provocative question
IMO it's not really a provocative question. But okay, I'll explain why not.
I mean...with lighter alternatives as tamron and sigma, or sony 20-70, does it make sense spend around 1000 bucks for big lenses as sony 25-104 f4 or also sigma art 24-70? They should cost less I think to be competitive now.
The 24-105mm is not even close to obsolete because, for many uses, there is no better alternative. If you need or really want the 71-105mm range--and in many cases, IMO 'just crop' (and throw away 56% of your pixels) is not a satisfactory answer--then no 20-70mm or 24-70mm can replace it. At the other end, I've had standard zooms starting at 24, 28, and 35mm, and 24mm is definitely and substantially more useful to me, so no 28-70mm, 28-75mm, 28-200mm, or 35-150mm is a good substitute.
Are there times and uses where I'd prefer a 20-70mm to my 24-105mm? Sure. But if forced to choose one, the 24-105mm would clearly be my choice because it's more useful more of the time for me.
Now, if Sony introduced a 24-105mm f/4 II that was somewhat sharper, somewhat lighter, and somewhat faster-focusing, would that be nice? Sure. If Sony introduced a 20-105mm f/4 or a 24-120mm f/4 that was in all other respects as good as the 24-105mm, would that be nice? Sure. But it is impossible to render the 24-105mm obsolete until there's an alternative that's clearly better for all, or at least the large majority, of uses. And there is no such alternative now, so the 24-105mm is not obsolete.