Would you consider releasing groups of songs with a similar tone like an album but still release them on a regular basis?
it seems to me, any similarity that tends to occur on albums, amongst the songs, is usually because of the time the songs were written or recorded. music created around the same time period will often have some similarities. Going against this, we can deliberately do a song 'differently' from the previous song. i think both of these trends naturally seem to occur regardless of whether the songs are done on an album or not