I worked with a huge multinational company that was trying to replace the system they used for planning.<p>The system was 10s of millions of lines of 16-bit assembly code written for a minicomputer in the  the mid-1970s.  The next generation of 32-bit systems in the early 1980s were able to run the code, so they purchased one and kept it running to nearly 2000.<p>They had a project that was trying to rewrite everything in C targeting the DEC Apha, but after 10 years it still wasn&#x27;t ready yet.<p>Because 80s era minicomputers sucked so much electricity, we were able to sell them new Pentium servers running SCO OpenServer that could emulate them. I always wondered if they ever got their rewrite project finished.