(Perhaps a not very well defined question)

Let $(S_t)_t$ be a (flat) family of compact complex surfaces. Assume the generic member is smooth while $S_0$ has isolated singularities. As the simplest case consider a degenerating family of surfaces in $\Bbb P^3$. Let $\tilde{S}\to S_0$ be the minimal resolution of singularities.

Can one obtain in this way some interesting surfaces (in the sense of geography problem)? (References on works/summaries?)

Suppose I have some inequality among the local singularity invariants of $S_0$. The inequality will translate into some inequality among the invariants of $\tilde{S}$. Are there examples when such singularity inequalities are useful?