This is something that is particularly noticeable as you get older so that you remember things 10 or 20 years ago. Of course, your own memories can be inaccurate, but people who weren't around at the time are generally completely unmoored because nobody examines primary sources.
I also doubt there are a lot of people who were following the impeachment because they wanted to decide whether or not to vote for Trump. If you already know how you'll vote, following the day to day political battles is, as you said, merely entertainment.
I assume people weren't watching to find out if he would be acquitted, either, although polls might be interesting to know.
Important people have been declaring odd things, like how they're sure he's learned his lesson, so it's hard to tell what people believe or expect.
And November is the only time it really matters. Until then, you can shake your tiny fist, but in November you get to make a choice that counts, literally.
You could follow it in real-time for the entertainment value, if you want. But if you actually want to make an informed choice when it matters, you'll have no trouble finding a book that summarizes it, and it will take far, far less time than trying to keep up with it (and remember it all come November).