More accurate scripts can show nuances well, especialy in slower action it performs very well to smooth things. Here you will notice the change, but often doesnt need to feel instantly over the top and allows you to ramp it a bit (start at 70, scales to 150 and then back to 70 again). Its well above the minimum speed in this case so slight changes arent causing a stutter or instant quick change.
Higher often makes it feel smoother since a 350-400 is felt less than 200-250 (percentualy less changed).
Just avoid exceeding the speed limit of 400 units per second and in most cases the handy will play it smoothly as long as you dont spam nodes. If going slightly excessive (450 or 500) it might not play all nodes perfectly (it can clip movements), but it should still feel smooth (no random stops).
At the same time, if nearing the lowest possible, you can also create stutters here, adding more nodes makes it harder to stay above that minimum speed. And here those changes are noticed best since a 40->50 change is still +25%. This is where adding nodes is usualy worse.
For very fast action where 400 is reached often, avoid curving the movement though. A slower move then is better to be slow entirely to make the diffirence noticed better.
Also, for lazyness:
https://discuss.eroscripts.com/t/makecurve-for-ofs/102751