Most of the work has been on CI/CD, Windows, rationalizing and modernizing the code, and Zheng, Pawar and Goodman contributed a stochastic gradient descent solv

Most of the work has been on CI/CD, Windows, rationalizing and modernizing the code, and Zheng, Pawar and Goodman contributed a stochastic gradient descent solver, described here, https://arxiv.org/abs/1710.04626 https://arxiv.org/abs/1710.04626 with benefits pointed out by Börsig, Brandes and Pasztor https://arxiv.org/abs/2008.10376 https://arxiv.org/abs/2008.10376 but it's not a default solver, you'd have to ask for it. Great people joined (took over?) the project and have done an amazing job of triage on open bugs, and some were even fixed. We rewrote parts of the network simplex solver to eliminate some of the dumbfounding "trouble in init_rank" errors. We have a long wish list, and are hoping for funding to do some of this work.