Well, it does contain the latest stable releases of all (or most) software included.
So maybe not really “bleeding edge” (that was more fitting for the old Factory), but not far from it either.
Everything gets tested in Factory prior to Tumbleweed and there is probably more testing than that.
Well, not everything gets tested…
openqa only tests things somebody wrote a test for.
Most importantly it tests that the system boots after installation or upgrade and gets to a graphical desktop.
Tests are being added all the time I suppose (or at least they can be added), but you can never catch every possible problem.
There is no other testing done in Tumbleweed AFAIK. Of course, upstreams should test their stuff too anyway before they make a release…
The release philosophy is still pretty conservative compared to other rolling releases, or so I thought.
Depends on what you mean with “conservative”.
Normally only stable upstream releases go in, no pre-release/beta versions or even release candidates (depends also on the particular package though, in some cases pre-release versions might make sense or are the only way). And there is automated testing before it gets released. But see above.
But as you apparently don’t want to update your system and lock out certain new packages, it seems to be not “conservative” enough for you, no?
I never tried apt-get, but I don’t want to. Now I think rpm based distros are the way to go.
I always preferred rpm myself…
But if you compare rpm with apt-get, you are comparing apples with oranges. apt-get is the equivalent to zypper, the Debian pendant to rpm would be dpkg.