>>16833578 (OP)
Cells have DNAses and RNAses that break down nucleic acids. These are mostly in the cytosol ensuring mRNA turnover, and defense against viral DNA. The DNA in the nucleus is protected by the lipid bilayer. However, over time the nucleus and generally cell boundaries and compartmentalisation break down, and DNA disintegrates.
Soft tissue may remain, but there will be little intact DNA. Still, there may be enough DNA in the bones to reconstruct a full genome.
The problem with cloning is you also need an intact oocyte. We can't yet make those, and even if we could, we don't know what maternal mRNA it would contain. Maternal mRNA drives much of early development, and so without it, without knowing what was there in what concentration, there is no real way of recreating the process.
We could use the egg of the nearest living relative, and insert the chromosomes, and we may get something similar, which could have eggs that have the correct maternal mRNA, which could lead to the next generation of clones to be more close to the original.
So the question remains. Why the fuck would we do this, who would pay for it, and what retard would spend years of their life doing it?
Pic not related.