I first provide a brief overview of the Sachdev-Ye-Kitaev (SYK) ?model, N fermions in zero spatial dimensions with infinite range ?interactions in Fock space and its relation to black hole and wormhole ?physics. Afterwards, I review some of my recent research on this topic ?focused on the non-hermitian SYK as a toy model for dissipative ?quantum chaos or quantum measurement, Euclidean wormholes and ?many-body topology. I conclude with recent results on the sparse SYK ?model that broadens the scope of theories with a gravity dual and also ?provides a novel platform for efficient quantum many-body fermionic ?simulations on GPU.