Just in the case of EEVBlog specifically I stopped watching every video years ago. I unsubscribed 4 years ago. I've unsubscribed from dozens of channels. And subscribed to as many new ones.
This is inevitable for
every channel. if a channel cannot find a continual new audience then it is guaranteed to die through natural subscriber attrition.
This is why Youtube not recommending certain channels (often due to political agenda) is killing them.
Independent news channels for example are very deliberately pushed down into the noise by the algorithm which now favors "authoritative" news source, i.e. those news sources that Youtube approve of.
It used to be a fair playing field, the algorithm was based on views in first few hours, engagement, sharing etc, so the independent person in their basement had a fair chance to succeed. In fact the independent players got vastly more engagement than the big news networks which get hardly any, so they were getting beat big time by someone in their basement.
Of course "they" weren't going to let that go on forever, so the "problem" has now been fixed.