What is your definition of boring? The concepts explored, for example, in Solaris and Stalker are far from boring. If you rely on a cliffhanger every 15 minutes, your taste might be boring to many cinephiles.
The real tragedy is that in our hyper-attention-seeking society that calling a movie "boring" is such a terrible insult. A movie that is strategically boring defeats our expectations. Movie makers know what we're expecting, and when we're expecting it, and delaying or flouting the fulfillment of those expectations can be part of the movie-making art. It's been a long time since I've seen Solaris, but I just recently rewatched 2001, and that's a movie that definitely uses boringness strategically. It has long sequences that communicate how long it takes to get around space, so that when you finally get to the Discovery One you can feel how far away and isolated Bowman and Poole are.
The soundtrack was in part created on a synthesizer (the ANS) heard in several AT films. Its tones are based on patterns drawn on glass. That part of the film survives (at 38m) here: https://www.youtube.com/watch?v=WrF1PSoTN3A
How it worked: http://www.theremin.ru/archive/ans.htm