Does XMMS not work for you? It's available in the AUR so I assume it still functions. And it'll consume about 0.01% of the RAM an electron app will

http://www.xmms.org

I actually have Audacious, which scratches the itch pretty well. A clean-room implementation of Winamp running on Linux would be more for the novelty than anything else.

I use Audacious with winamp base skin, it give the nostalgic feel with all the cool music playing features :)

I came here to make the same suggestion but he's got a gitlab link. I might just take a crack at trying that myself.

Let me know if there is anything I can do to help! I recall it was hard/impossible to get non-rounded corners on MacOS.

xmms2 was there all along!