I don't think you will see any dramatic boost :- ) Threadripper is already fastest at multi-threaded workflow with low-voltage memory. For example, 3990X stock (no PBO) can achieve 16 seconds easily with stock JEDEC 2400 MT/s memory. OC-ing to 3200 MT/s, lower timings, and upping the voltage to 1.35/1.4 will bring the score to 17 seconds :- ). So, slower. Really, the CPU isn't neither bandwidth nor latency limited with most multi-threaded tasks. Oppositely, fast memory is taxing on the IMC.
You will see massive benefits when gaming at 1080px ;- ). Fast memory is really mostly feel-good thing in benchmarks, zero difference in reality for almost everything. The only people who think it makes drastic difference to their lives are terminally online youtubers and redditors.