A few weeks doesn’t seem like enough time right now, especially given the current state of Windows 10. The latest build (10130) looks almost finished and polished, but then there are continued issues with the Start Menu not opening or crashing and driver problems that are slightly alarming at this stage of development. Perhaps the biggest issue I have encountered is the upgrade process between builds. Microsoft has been testing this vigorously, as it’s a key part of getting Windows 7 and Windows 8 users to Windows 10 for free. If an upgrade fails then it’s one less machine running the latest operating system. I’ve had a variety of upgrade failures, even with the recent builds that Microsoft has distributed.
The consensus among testers seems to be that no, Windows 10 isn’t ready. Unless they’re going to pull a miracle, we’ve got a Vista-esque launch on our hand.