About a year ago there was talk of a loop function that could be used in sequences. The way it was explained is that the loop allows you connect one thread in the sequence to another thread. This would reduce redundancies because you may only need to create a certain step once in a sequence. If this step is done multiple times after a certain point, this point can be looped to where the sequences should continue. The different threads of a sequence would not be bloated.

Hope this attempt to visualize makes it more tangible:

sequence start

thread 1 thread 2

step 1 thread 3 thread 4

step 2 <-------------------|--------------------|

Step 2 (and everything that may follow) doesn't have to be inserted a second and third time in thread 3 and 4.