Pre-orders don't make sense in the case of downloadable games, where there is no scarcity.
that's 1 good reason to preorder, plus some bonuses that tend to be lame.
AMD has already committed to using the same socket until 2020.
I disagree based on my personal experience. The CPU upgrade path for my current desktop computer ended roughly a year after I bought it, even though that CPU generation had been introduced very recently by Intel. I got a relatively high-end CPU, so upgrading to anything but the highest-end CPUs of that generation doesn't really make sense from a performance point of view. Yet those still cost a surprising amount of money today and offer worse performance than the midrange options of newer generations.
Simply put, extending the lifetime and thus upgrade path out by at least 150% means that the options available 5 years down the line will be 150% "better", even though no CPUs for that socket might even be in production anymore at that time. For me that seems like a significant advantage.
Turbos are going to be pretty iffy under sustained load, let alone Precision Boost and XFR, which are (iirc) enabled by default.
https://www.youtube.com/watch?v=aKe7CnZT9ZE
AMD is shipping all the review kits with an unspecified "add-on VRM cooling kit" to try and help that, and there are second-gen X399 boards coming out with 16 phases (up from 6-8 in the first gen).
That being said... Processor pre-orders? I had No idea that was a thing. Hope you get a QA discount. It doesn't talk about sockets but for sake of preorderers I hope it's compatible with original threadripper boards. edit: Actually it does, and they mention it's compatible with existing main boards too. I missed that this was multiple pages.