While Ukraine has dealt a major blow to the sabotage of the Amur Railway, Russia's main Trans-Siberian Railway line provides spare capacity, experts warn that it also has its own weaknesses.
The Trans-Siberian Railway (red) is one of the two lifelines of Russian military supplies, and it also has a lot of loopholes.
The 10,000-kilometre-long Trans-Siberian Railway is the central link between the Far East and Russia, with an annual carrying capacity of nearly 72 million tons. While mostly multi-track, unlike the BAM's single-track, obsolete tunnels such as the 1 km crossing in 1910 still had bottlenecks in replacement work.
According to Defense Express, the disruption of the Hung Yen tunnel network could have a serious impact on the Amur region. Even bridge failures on small rivers often cause traffic congestion – a small-span failure in 2021 resulted in the standby of 500 trains. With the withdrawal of BAM, the Trans-Siberian Railway will see a surge in freight traffic, pushing its limits. 
So, while there is no point that can match the strategic value of the Severomursky Tunnel, the Trans-Siberian Railway itself is a fragile lifeline. While none of the railway sabotage was decisive, the cumulative effects could prove the Achilles' heel of the Russian railway giant.