What exactly is dated in F1 ERS design?
The 2026 MGUK has a minimum weight of 16kg plus 4kg for transmission to the ICE.
A similarly powered motor from the Tesla Model S is 45kg.
The battery cells themselves are, I'm sure, the same, or very similar, to those used in EVs now.
EV control systems have different requirements to hybrid systems, for the simple fact that they don't have to deal with an ICE.
BMW's M Head of Motorsport Andreas Roos stated recently that BMW is not interested in F1 since it hybrid tech is years behind. Only in '26 they will catch up to current road-relevance tech, but they can already get the same relevance now, 3 years earlier, in WEC and IMSA.
He has the same sentiment about the introduction of sustainable fuels in only '26 in F1.