Those are exactly my thoughts too - if something isn't broken, why fix it? Hypothetically, what if they come up with a future product like "Unigel" (The antonym of poly by the way) which has different properties and requires a different training method? It means that those who have paid for the polygel training would lose out completely. IMO, I don't think it is a "future proof" product and there will be others on the market that will be cheaper and/or better.
What I don't understand is why polygel is sold in sally beauty stores and any nail technician can buy it although they are not insured for business use. It doesn't make any sense to me.
I know of ACG and they have released their "polygel" version which is soak off.