Compared to early Soviet-era failures, where have points of failure shifted in modern Soyuz variants?

Answer

Toward the complexity of avionics and choreography

As the rocket matured through variants like Soyuz-T, TM, and MS, the points of failure shifted toward the increasing complexity of avionics and the delicate choreography required for sensitive cargo or crew transport.

Compared to early Soviet-era failures, where have points of failure shifted in modern Soyuz variants?
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