PortFolio Magazine Technology ColumnWritten by Tom AnthonyMay 29, 1998 Is it just me, or are the new computer models superseding the old ones so quickly that it seems to be a blur? Recently I mentioned to the guys at my favorite computer store that I would be building a new PC to replace the three-year-old dinosaur in my home office. Once, the day I brought the cute little DX66 computer home, it WAS fast. Compared to the computers at work it was like a lightning bolt. I’m not entirely sure it was my imagination, but it seems like it has been gradually slowing down every day since. Way back when…