Complex sentence: By 1972, the 8600 had reached a dead end; the machine was so incredibly complex that it was impossible to get one working properly; even a single faulty component would render the machine non-operational.
Split into simpler sentences: By 1972, the 8600 had reached a dead end − the machine was so incredibly complex that it was impossible to get one working properly. Even a single faulty component would render the machine non-operational.