Back in the day....
.....I never had all this trouble with my CP/M computer. No hidden "management engines" in 8080 or Z80 CPUs.....anyone with access to the motherboard would find <gasp!> NOTHING THERE....because there was no hard drive. (Hint: the floppies were stored somewhere else.) There was no LAN, and the internet didn't exist, so "remote access" was also completely absent.
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All that said, Wordstar and Supercalc and dBASE-II and BDS C were all very productive...a huge improvement on the manual methods used previously.....this was a huge stride in increased productivity.
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Have we really made similar huge strides since then? It's pretty clear that the downsides today are MUCH more threatening. What am I missing?