How long Stalingrad-class ships might have served

How long might two completed Stalingrad-class battlecruisers have remained in service?

About forty years is plausible, with a potentially enlarged Kirov-class successor replacing them around the early 1990s.

A service life of roughly forty years is plausible for two completed Stalingrad-class battlecruisers. That would carry them into the early 1990s rather than make them brief curiosities of the 1950s. Their longevity raises the further question of what the Soviet Union would build to replace them. The Kirov class is offered as a possible successor, with continuity from Stalingrad perhaps pushing Kirov toward an even larger design.