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.
Москвичей предупредили о резком похолодании09:45，这一点在爱思助手下载最新版本中也有详细论述
圖像來源，Getty Images，更多细节参见雷电模拟器官方版本下载
Андрей Ставицкий (Редактор отдела «Наука и техника»)
有没有发现，这其实还是当年「Touch Bar」推崇的理念。