  In this paper we present the main developments in Oka theory since the
publication of my book Stein Manifolds and Holomorphic Mappings (The Homotopy
Principle in Complex Analysis)}, Second Edition, Springer, 2017. We also give
several new results, examples and constructions of Oka domains in Euclidean and
projective spaces. Furthermore, we show that for $n>1$ the fibre $\mathbb C^n$
in a Stein family can degenerate to a non-Oka fibre, thereby answering a
question of Takeo Ohsawa. Several open problems are discussed.
