This scene at 1:16:00 https://youtu.be/9Bpld0nGL2I?si=I7-z0FIONkIflCSA&t=4552 shows a great example of very insistent motivic development to score a tense moment and increase expectaitons. The technique is almost like a signature of Schostakovich, the expressionist Beethoven . DEvelopment is an abuse of language, because what he does here is to KEEP the motive for a long amount of time. A very effective and economic technique that is not so much used today.