This is interesting:
“The openSUSE Project today announced the development version of openSUSE (called Factory) has become
an independent distribution using the “rolling release” development model. This means Factory is no longer just the
development branch of openSUSE – the reliable, modern and easy-to-use multi-purpose Linux operating system – but a
tested and stable fresh-daily bleeding-edge distribution.”
I haven’t used Factory and I’m not sure how it differs from Tumbleweed, but the idea of a very stable rolling release that has more recent packages than Debian Testing is pretty intriguing.