Yes, it throttles less and things like renders and exports take less time but this machine already has about 10 minutes of "buffer" before it throttles and as a result you don't see the benefits before pushing the device beyond what's reasonable for an ultraportable laptop.
I would rarely do anything that lasts more than 10 minutes of full CPU/GPU load and when I do it would be something like half an hour and the thermal pad mod will give me back 5 minutes.
If I'm going to render something that takes hours, I would not do it on my machine that I use for everything. I would do it on some desktop with Nvidia graphics or I will rent a machine build for the task.
I don't think it's necessary.
On the other hand, I also modded my girlfriends 2020 Air with Core i5 and the improvements were much more noticeable. Unexpectedly, the battery life improved too.