Oh, I remember. After the TRS-80 our high school had, my fraternity had one of the Compaq luggables. First Microsoft OS based computer I used. We had a sign up sheet to use it, and as a freshman in the house, your times were generally midnight to 8AM. Really thought I had moved up in the world when my Hydrology class got to use some Zenith PC clones - they had 5MB hard drives! Ran Lotus 1-2-3 spreadsheets off of dual floppies though, as the Lotus version didn't recognize storage other than A and B drives.
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As to why I've made my living in the Microsoft camp? Generally, the breadth of what we now call the ecosystem. All the heat and light (smoke and mirrors(?)) that revolves around the competing ecosystems today doesn't compare to what the 90's and early 2000's were to developers. I've worked across industries (retail, heavy and light manufacturing, health care, non-profit) and have had a hand in a custom home grown ERP for a global manufacturer, a custom insurance benefits management system, a web based community services system, and dozens of other implementations of various systems. Only Microsoft had the products and 3rd party involvement from front end to back end, start to finish.