That's why all manufacturers (except noctua) are now selling AIO - cause at least one day you'll need to replace it. The only reason people bought new CPU coolers between 2000 and 2015 was because every year better and bigger CPU coolers came out. But now air cooling has reached its peak - it's a sunset industry, people buying CPU coolers are now mostly just new gamers not existing ones upgrading. So now most air cooler manufacturers have also left the game only leaving a handful left, air coolers just don't sell well anymore and there is no innovation.
And then to make matters worse, AMD is shipping its Ryzen cpus with capable air coolers and leaving 3rd party manufacturers fighting for scraps.
its why we are seeing a raised price on aio, adding rgb effects and what else.
They did the same with keyboards.
If I want aio I have basically have to pay double vs a Noctua air cooler.
I did run custom water cooled for more than 10 years then the pump went.
Atm I am using my ryzen cooler as it works just fine for the cooling bit.
Manufacturers want to ensure you either replace the item like lightbulbs worked previously or raise prices due to less demand.
So, I could now either replace the pump which cost more than a new noctua high end air cooler....
Its just that I enjoy as far a less hassle and aio will be more prone to break down as it has more parts.
Today's cpu use boost technologies so the cooling isn't needed the way it was previously unless you buy old Intel tech on 14nm that is.
More power efficient cpu, better tech algorithms like Ryzen to adjust on workloads on 1ms intervals just makes aio, unneeded.