Request: Some sort of support for .innerHTML optimization with hydratable

[Conduitry]

The .innerHTML optimization when creating blocks of static HTML is nice, but unfortunately it's not usable when compiling a hydratable component, which happens whenever you're compiling something for Sapper.

I understand the reasoning behind this limitation (we need to be able to access each of the separate DOM nodes to hydrate them), but this is still an unfortunate limitation. I have no idea of what another way of handling this would be.