There is a lot of suspicion that the drug that follica is using with its new applicator is primarily minoxidil, so maybe they have figured something out. Though if I'm honest the results look eerily similar (aprox. 4x increase to 5% minoxidil) to the Microneedling study released a while back with the method being almost identical, so am curious how many in office visits will be required.
There has been a lot of arguing going on in this thread regarding oral vs topical. Fact is, topical is safer than oral minoxidil unless you have a higher blood pressure in which case it could be beneficial. With the dosages the majority of people are taking for hair loss, I don't see it being a major issue unless you have a low blood pressure to begin with, and yes there are studies on the effect of low dosage minoxidil on the blood pressure, with participants dropping out as a result of this, have a look at this threads topic and you will see this to be true.
There are other side effects of taking oral minoxidil outside of hypotension, and for hairy reasons i'd probably recommend women avoid the drug.
https://www.rxlist.com/minoxidil-drug.htm#side_effects
The ones I personally am concerned about is number 1 and 2 on that list, which could be potentially solved with a diuretic but then you have to take into account the risks of diuretics. So yes, Topical one point. That isn't to say though that a low dose of oral minoxidil doesn't have an acceptable safety profile for most people, just that topical is safer. If it goes systemic regardless of it passing the GI tract fluid retention is still a thing, I just don't think the risk is as large.
In animal studies, there was liver damage with oral administration, however in autopsies done on humans, they didn't find anything but is definitely something to be aware of.
Now there are potentially benefits outside of lower blood pressure by going the oral route, and that is an increase in the production of Elastin, but since it's has not been proven in humans to work nor do we know the ideal dosage if it did work, you can judge that one for yourself, it definitely shouldn't be a reason to take oral minoxidil but I find it interesting none the less.
This is the link regarding Elastin :
https://www.ncbi.nlm.nih.gov/pubmed/28056723
Next is how effective it is for hair loss, since we don't all have sufficient sulfotransferase enzymes in the hair follicles, if you took 100 people and compared oral is going to show better results. That isn't saying there aren't people out there who are excellent responders to topical minoxidil, because they do exist.
In comes tretinoin, the only study I could find showed 43% of suspected non responders were converted after 5 days of tretinoin applications, that still leaves 57%.. and it doesn't even state how effective it was for the newly converted 43%. There is definitely more research required for that one, as maybe that number increases over time, if you find the best case study for minoxidil, and then divided the non responders by 2 and added it to the responders pile, you would still be unable to find a study which showed worse results for oral minoxidil at 2.5mg or higher and that is not even taking into account the significant difference in the results of the responders, though as that is harder to compare cross study, it is fairer to just use percentage of responders. So for now oral is more effective but in the future that may not always be the case.
Then lastly convenience, this one is pretty obvious.
TLDR if you respond to topical minoxidil and are getting the results you want, great! If not adding tretinoin, dermarolling or taking it orally is a possible alternative, just be aware of what the drug actually does. End of the day it's your body, it's not like we go up to strangers in the bar and lecture them on alcohol consumption.