Fission creates neutron embrittled materials and steels as well. And yes we tend to store them until they can be safely disposed.

Again, the main difference is the fuel. Tritium is safe in a few decades, spent uranium is safe in a few hundred thousand years.

Fusion creates much less long term radioactivity.

However, the mass of material contaminated with radioactivity is very high, since the radioactivity that is created is not concentrated in fuel elements, as it is in a fission reactor.