Was it a mistake that we can't upgrade the DFW power plants? Or are those just not upgradeable?

[Platinasm]

Upgrade slots are missing on DFW buildings, most notably the power plants. Is this by design? Or was it accidentally left out?

 

[Jens Erik]

Hi there! This is a bug, as they should work the same as all other Power Station. The team is aware of this.