Its more that you can move the rad about to either get intake air or blast all the cpu heat out of the case. You do have low airflow over the mosfet heatsinks then though. Having seen air coolers hit the £100 mark I had assumed the ones at £50 would be average at best these days when looking for performance rather than rgb and shiny. I do know my really old 240mm AIO I got from here around 8 years ago is still going strong, OCUK own brand thing that came with a G13 bracket. Used it on GPUs and CPUs, its currently on the 3600x @ 4.25ghz 1.3v. Keeps that at around 70c in prime but its in an ITX case with the rad configured as intake and fans set to max out at 1100rpm. Everything else I have is on a proper custom loop, closest thing I have to an AIO other than that is an EK Predator 240mm heavily customised cooling a 3800x and 1070 but its setup to run hot and silent.
Probably shouldn't have said anything tbh, the air vs aio question never goes down well on public forums