The tradeoff is complexity. The microcode must be carefully arranged so that the instructions in delay slots are either useful setup for both paths, or at least harmless if the redirect fires. Not every case is as clean as RETF. When a PLA redirect interrupts an LCALL, the return address is already pushed onto the microcode call stack (yes, the 386 has a microcode call stack) -- the redirected code must account for this stale entry. When multiple protection tests overlap, or when a redirect fires during a delay slot of another jump, the control flow becomes hard to reason about. During the FPGA core implementation, protection delay slot interactions were consistently the most difficult bugs to track down.
However, he does believe it can be "hugely valuable" for creators who are trying to get noticed.
，这一点在夫子中也有详细论述
在头部行业中，半导体业下滑较为明显——在披露研发人员的企业数量增长47.58%的情况下，研发人员增速仅为7.71%，导致平均值的跌幅达到27.02%。叠加研发投入五年增长53.87%，说明该行业的资金优先投向了技术与设备，而非人力扩张。
创造力，在它最巅峰、最纯粹的形态中，是人类全情投入、卓越执行，以及某些时刻运气加持的结晶。
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