I've got to make sure you and I are on the same page....you do know I mean the new growth of nodes....right? The nodes that are already on the plant aren't going to start alternating. I'm not sure where you are in pot growing, so I'm not sure where to start.
How many crops have you grown indoors?
I've been growing for more than 40 years and inside exclusively in hydro for 25+ of those 40.
I've managed hundreds of crops for others and have grown hundreds of them in my own grow rooms.
I see anomalies once in awhile, but what I've said is pretty much the norm unless the very newest strains have different characteristics than those that I've grown.
The reason that alternating nodes develop is the same reason the plant won't grow flowers until the hormones within the plant are of a balance that allow flowering to take place. When these and many other hormonal adjustments take place, the plant moves into it's next phase of growth.
If someone has bred a plant that now doesn't require the same hormonal stages in it's development, that would interest me a lot.