most call them AIO and they are "all in one" units. The term fits.
had a rover V8 for years with no issues. alu block, cast heads and copper rad.
there not all in one as they dont cool CPU and GPU + memory + ssd - hence all in one cooling solution of a desktop... preinstalled and fitted QDC modules to add on the fly to a loop is AIO
Ever Meet EKWB or Alphacool staff and ask them about other AIO products and they'll give the same grilling above
MAWT in a car is different to a PC water cooled system. Along with operation temps ( AIO/CLC has 95% greater chance of MIC) as car water systems are over standard 30c in PC set ups etc .
If i recall a car pump/engine has about 5mm of corrosion allowance , the mass/surface area of them is quite large compared to the Fins used on the cold Plate of a AIO/CLC which can be under 1mm think...
and then you've got the liquid inside. Mayhems if you wanted to could drink it and be okay-ish . Car cooling fluid... drink that and you'll be seriously ill. One is at the high extreme of liquid material to prevent great corrosion loss . Corrosion is what i do for a living > Oil platform lifespan