> It definitely benefits web in a way, but rising complexity makes for a security nightmare and i wonder how close it brings browsers as a kind of software to limits of sanity and comprehension.

Note that this is much of the idea behind Rust (which is used by this series): browsers are too large and difficult for humans to guard against the presence of vulnerabilities, so we use software (i.e. compilers) to do it. Compilers have a much longer attention span than humans do.

Sandboxing can also achieve this, although at a much more coarse-grained level.