  The fundamental excitations in superconductors - Bogoliubov quasiparticles -
can be either a resource or a liability in superconducting devices: they are
what enables photon detection in microwave kinetic inductance detectors, but
they are a source of errors in qubits and electron pumps. To improve operation
of the latter devices, ways to mitigate quasiparticle effects have been
devised; in particular, combining different materials quasiparticles can be
trapped where they do no harm and their generation can be impeded. We review
recent developments in these mitigation efforts and discuss open questions.
