I'd say the primary disadvantage of Tesa, for permanent, anti-aging use is the lack of a "pharma" option. But of course, most using GH aren't going pharma, and a good proportion of those who do spend for the assurance pharma produced GH are probably just getting UGL in counterfeit package.
Perhaps the guys who supply pharma products from outside the US can offer Egrifta for less than the $8,000 / mo US cost. It's eligible to be made as a generic, but no producer has stepped up to do it. The problem is the new aids drugs don't suppress GH the way the old ones do, so the population using Egrifta for its approved use is shrinking.
Unlike growth hormone, which cannot, by law, be prescribed for off-label uses, Egrifta can, If more docs prescribed it for anti-aging, high cholesterol, or fatty liver disease purposes, which it's demonstrated very good effectiness in treating, I'm sure the demand would justify a generic maker to spend the money getting a product approved for the market, and probably reduce the price to a few hundred a month,
Remember, unlike Sermorellin and Ipamorelin, Tesa is FDA approved and has 20 years of use demonstrating its relative safety. And instead of just shoving in extrogenous synthetic GH, you're producing your own, the best kind, along with numerous "side products" that are excreted with GH, many of which we don't know the purpose of, but likely evolved to accompany GH for a reason.