I’ve had an AIO for years and had no complaints, but I just bought a fan since AIO can fail more easily over time. There are more parts that can fail and water can eventually evaporate or break down the materials.

I think it depends on what the use case is. I’m using my PC as a sever that I want running 24/7. As such, I don’t want fewer points of failure and I’m concerned about potential failures when I’m not home. Whereas, if it was just a gaming PC that I only turned on while I’m playing, I might care less as I’d be able to monitor it in person easier.

Food for thought.