Not the user you replied to, but for me, Youtube's "automatic mixes" loop pretty quickly. Also, YT is a bit more of a pain to use on mobile (either leave a video running, uses up battery and data, or use a modded version of Youtube which pretends it's Youtube Red and has background playback enabled).

Soundcloud "just worked". It even caches your feed after you listen to it, so I was able to use it without it using my mobile data for a while.

well youtube has a video associated with it, i usually plug my phone into the car and listen there. Plus the youtube "mixes" thing isn't remotely the same thing as a good set from a real dj.

The dnb subreddit focuses mainly on new releases of individual tracks and discussion about artists, not so much for people to post mixes.

I dunno, soundcloud was just better. I could sit in the car and search for an artist and find a mix (bootlegged or otherwise) and listen to it within a few seconds and be on my way. Other things are just clunky and requires a lot more planning in advance.