I'm sure I'm not the only one who has ever had something interrupt a bootstrap process about 15 minutes from finishing. Currently, the entire bootstrap process would have to be restarted. If an option were added to the bootstrap script that added '--noreplace' to all calls to emerge, this would effectively bypass the packages that were already built as part of the bootstrap (atleast, I think it would). Since it would be an optional flag, it shouldn't cause mysterious problems with packages not getting built/upgraded during a bootstrap. I can't think of any reason to not add this, although others may have some good reasons. Flame away!
use the -r flag from the beginning
Ah, I was looking in bootstrap.sh. I wasn't aware there was a new bootstrap-cascade.sh script.
once we've proven the cascade version a bit more it will become 'bootstrap.sh'