Had my gtx660ti for 4½ years, my gtx970 for 2½ years and not a peep of problems from any of the 4 fans. Nothing wrong with axial fans as such, just with poor designs and lackluster manufacturing practices leading to short lifespans. As it is, centrifugal designs barely keep up with thermal issues, especially on the VRM's and other voltage regulatory circuitry, vram etc amd limit the amount of usable real estate on the pcb making for larger cards. Axial solutions allow for shorter pcb's and better possible cooling. Centrifugal designs also have 1 glaringly major flaw. In pc cases with limited, if any, dust filtration (pre-built and cheaper budget cases) centrifugal gpus can and will overheat quickly due to dust build up blocking the airflow channels, which honestly doesn't take long. The problem there is that the processor is the only component with a temp sensor and rarely sees higher temps vrs the now passive cooling on the VRM's side of the board. Has a strong tendency to cook those components, especially the vram, causing all sorts of artifacts and lines on screen. There's always multiple posts on gpu issues with visual irregularities yet temps never go beyond 70ish °C
I'll keep my axial gpus thanks, but I'll never be able to afford the Evga 1080ti, and no matter how pleasant the aesthetics might be, the cost isn't justifiable with a family to feed.