Random amenable ${\mathrm{C}}^{\ast }$-algebras

What is the probability that a random UHF algebra is of infinite type? What is the probability that a random simple AI algebra has at most $k$ extremal traces? What is the expected value of the radius of comparison of a random Villadsen-type AH algebra? What is the probability that such an algebra is $\mathcal{Z}$-stable? What is the probability that a random Cuntz-Krieger algebra is purely infinite and simple, and what can be said about the distribution of its $K$-theory? By constructing ${\mathrm{C}}^{\ast }$-algebras associated with suitable random (walks on) graphs, we provide context in which these are meaningful questions with computable answers.