Considering the Buran has never put a person into space, its still fair to call it an experimental and a failed project. The STS was doing all these things and more. Its an interesting bit of Soviet trivia, but all the attention it gets on the internet is fairly amusing for whats essentially the poster-boy in mismanaging a spacecraft project and what essentially became a Soviet "make work" jobs program, as the higher-ups knew early on that this thing would never be put into production due to a variety of factors including cost and technical issues.
I find it interesting that these things haven't been turned into scrap yet. There's something to be said about how overly prideful and nostalgic Russians are about the USSR. I think Putin put one of the Burans indoors after it was discovered to be sitting out amongst the elements. Most governments would just recycle failed capital projects. Unless they're bringing this thing back, it seems weird to have it sitting around in various corners of their launch complex.