I consistently hear people on YouTube complain that the subscribe button doesn’t do anything for viewers, now that channel notifications are controlled by the bell. But it does do something: it puts the videos from that channel in your subscription feed, which is readily accessible on all versions of YouTube. So why do people act like it doesn’t exist? I think it’s super convenient, especially if you’re subscribed to a ton of channels and don’t want your notifications feed flooded with new videos.
I don’t use YouTube website at all. I’m not even logged in there. I use purely RSS feeds of my selected channels, and my RSS reader embeds those videos in its web UI. I hate all the noise of the standard YT.