Most replies are still missing what the breakthrough really was. The whole point as to why that story was newsworthy had nothing to do with nuclear energy, but instead much more to do with nuclear weapons. The Department of Energy allowed for that misreporting to spread to detract attention away from that fact. Read this if you care:

https://thebulletin.org/2022/12/the-energy-departments-fusion-breakthrough-its-not-really-about-generating-electricity/