ElMojoMikeo :
There is usually some common sense attached to Intel decisions. Not always appreciated at the time but usually when you look back you can see why. As an example the XEON 2687W vs 3970X. Essentially the same processor the XEON eight cores and locked. The X processor six cores ( two disabled ) and unlocked. The reasoning behind the two disabled cores was clock speed increases on eight cores caused thermal problems.
At the time Intel were accused of doing this as a marketing strategy. Well it would appear that it was just good old common sense. Why did they remove the solder? It could be for any number of reasons.
We can safely say that Intel know exactly what they are doing, because they alone have all the information and data required to make such a decision. I would guess it caused a problem that outweighed the thermal benefits it offered.
I remember a previous thread ended up with some very expensive cooling solutions. I seem to remember some time ago someone was attempting to make a processor socket cooler. The processor pins made the normal contact with the metal in the socket holes and a ceramic under side that was actively cooled. The pins of course go all the way up to the processor die. The socket cooler was on the underside and a liquid AIO cooler fitted normally.
In theory this looked a good way to move forward. This would also avoid having to delid the processor. Why are there so few socket cooling solutions?
I use to think that too, but you apply logic to it and it doesn't make any sense other than a Big Business Strategy.
It is true that if you get soldering wrong, it can make the CPU unusable with time, using TIM is a better idea as it's more tolerant of mistakes and flaws in application. For run of the mill CPUs it makes perfect sense to use paste instead of soldering. On server CPUs, with 24/7 use a good thermal solution is necessary, so soldering is used, this is also why there's a premium on Intel server CPUs. 24/7 usage and warranty for normal use.
With this processor, we're talking, "Enthusiast's" you're already paying a premium for an unlocked processor to overclock, why not solder which IS the best thermal transfer solution and just charge a premium cost on top of that?
Big Business decision, "Enthusiast's" are going to push their CPU to the limits, so any flaws in the solder job will become apparent. This is a risk to the CPU manufacturer, having to warranty, "Enthusiast's" CPUs, putting in TIM means a real, "Enthusiast's" is going to delid the processor for the best thermal performance, thus voiding the warranty. Even if they don't, they don't have to deal with solder failure either, it's a win for them lose for the customer.
Enthusiasts, are a very small portion of the market, Intel isn't going to go broke soldering "Enthusiast's" CPUs and warranty them. This is just a big middle-finger to the "Enthusiasts" and plain greed, the only reason that makes sense.