核心的瓶颈首先在于精度问题。目前技术虽然在不断进步，但在打印精细结构或大尺寸零件时，依然难以达到高精度装配所需的公差要求及优秀的表面质量要求，这直接导致了打印件难以直接作为最终功能部件使用。
block: Writes wait until buffer space is available. Use when you trust the producer to await writes properly.
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And while it used to be a pain to transition from Windows to Mac, it’s far easier these days, especially if you mainly rely on web apps. It also wouldn't be tough for Apple to make short tutorials to help Windows users get their bearings with the macOS basics, like installing apps and juggling app windows. Apple could also make a play for iPhone owners using Windows, who may not be aware of the many ways iOS and macOS are integrated. iPhone mirroring may be a huge draw on its own.
Paul Costelloe's son pays tribute