[thisisabore]

Kodi, using LibreELEC, on an aging PC I built myself (with one of the smallest cases I could find back in 2010 or so).

I'd recommend reading the recommendations on the Kodi forums regarding hardware choices, depending your needs/wants: https://forum.kodi.tv/showthread.php?tid=252916

At any rate, I think these days the which media centre question is mostly settled, it's Kodi. The question is: running as an app on Android? On your laptop? On a proper dedicated box and OS? If so, from scratch? Using one of the purpose built distros? (OSMC, Libre ELEC).