[Dr4kn]

No one can generate enough energy with fusion at the moment. Even if Helion could do it today they would need to build a larger reactor and test that too. Then build the one for Microsoft. To do all of this in 4 years is pretty much impossible

[peutetre]

Helion's reactors are smaller and simpler field reversed configuration reactors. They've built multiple prototypes over the last 11 years:

https://en.wikipedia.org/wiki/Helion_Energy#Development_hist...

The prototype currently under construction is Polaris. It's 25% larger than the previous prototype and they expect it to achieve net electricity production:

https://www.helionenergy.com/polaris/