I agree with your argument below, they are indeed the cheapest and fast.
i do agree with abiky that the transactions in tron is blazingly fast and cheap. ~.but using this network is really one of the cheapest that you can find. but of course, once its price goes higher, we may expect that their fees as well will go a lil bit higher.
but if they say they have to attract new projects for this platform, I have doubts because "TRON" is a Chinese manufacturer, which has issued regulations prohibiting cryptocurrencies.
are you sure about the new project from their platform?
maybe, right now, it is lacking massive promotion as other new networks are highly promoted by their respective devs.