The first sentence on https://mpc-hc.org/ is, "MPC-HC is not under development since 2017. Please switch to something else."
https://github.com/clsid2/mpc-hc
In many ways it's a display wrapper about codec components, the display part is in active maintainance and bug fix mode (last update two weeks ago) and the codecs are constantly being improved (and expanded as new ones emerge).
There are two or three MPC-HC spin offs that are tweaking the core to do new things.