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Nope:

https://en.wikipedia.org/wiki/CANDU_reactor

The CANDU is a successful attempt, the energy amplifier was never attempted, and self breeding reactors are a material engineering problem (alas not yet completely solved), not a physics problem.

Throwing a fraction of what we are spending to chase the "fusion dream" we could have achieved a great deal more for present reality.

Again that's all IMO.

edited: clarification

How about IFR reactors - https://www.skirsch.com/politics/globalwarming/ifr.htm

FAFAIK, breeder reactors have never been operated commercially. There have been proof-of-concept reactors in the 60s and 70s, but nothing in widespread operation because of the political uncertainty of nuclear power. According to [1], no new reactors have been built between roughly 1985 and 2015, and the only new reactors are now found in Russia and India.

[1] https://en.wikipedia.org/wiki/Breeder_reactor#Development_an...