[yxhuvud]

> Electric heating converts practically all energy into heat

No, not even close. There are huge losses in electricity production and transmission.

[authorityofnil]

Which is why I covered them in my comment about CHP, which recoups a large portion of those "losses". Either way other power sources also require logistic challenges and/or big equipment installs to use, so it isn't exactly 1:1 comparison.