Does anyone have an opinion on stem splitting and ...

It's a complicated technique that allows the plant to basically go into overdrive. But I wouldn't recommend doing it with all your plants if your going to try simply because if you mess up your likely going to kill part if your plant if not the whole thing . I personally think that this technique isnt really needed here unless your trying to experiment . I would also recommend that you have some green plant tape on stand by to help mend the wound . I hope this information is helpful to you on your quest to becoming a grow master! 😁

Yes it works put it's tricky and takes practice. I would do it if a had more than one plant. And only practice on one at a time.