The same people are perfectly fine with Electron crap all over the place, they don't really care about overhead.
Not true in a data center - 20% less work for same CPU is like 25% more cores needed for any applications where the scaling is driven by CPU utilization. That is $ - and people have made things so far from efficient many medium size companies have 100k cores to pay for.
I'm having a hard time believing that data centers are chomping at the bit to use the Hurd.
If people really cared about performance, we'd be doing something other than the bloated way we have been doing things.