To me it's not even the comparison with builds that's damning; it's the comparison with handhelds and other mini PCs. Most people excited by this probably have a Steam Deck or another handheld, so they have to be into playing a very specific slice of games that can run slightly better than the handheld.

For example, Forza 6 on high 1080p is 60 for SM vs 40 for high end handhelds and 30 for SD. Even at the original price, is it really worth $750? Not to mention that many handhelds and mini PCs also have USB4 ports that one could attach a retired GPU to get 60fps+ @ very high 2k, but the Steam Machine has no such port and only one NVMe slot.

So this is for people who are allergic to the existing solutions (plugging in your handheld, using Moonlight) or just like the brand, but I know it's going to still sell out. I just don't want to hear about extensibility, eco-friendliness, or cost effectiveness from a certain segment of gamers after this.