the problem is that i have never seen any of them actually do this in real life and that matters most not theory. because in reality the problems show themselves.
That's certainly true, mate. Many of the cryptocurrencies which make use of a DAG only display a theoretical throughput instead of actual results. They haven't been tested intensively under real world conditions using the main chain. While there's no doubt that DAG is far superior than Bitcoin's blockchain, it's still questionable whenever it could process a huge amount of TPS. The fee-lees structure of this algorithm makes it ideal for microtransactions.
Right now, there's potential for microtransactions to take the world by storm in the future. The most popular implementations of DAG-based cryptocurrencies are Nano and IOTA. If successful, they could make microtransactions great again for the whole mainstream world to adopt them. On the other hand, Bitcoin's Lightning Network will achieve nearly the same purpose enabling a full-fledged crypto economy in the future that will change our society in many ways.
In the end it'll be much easier to tip others, send minuscule amounts of money to view content, and even pay for a cup of coffee without spending a fortune on fees. But of course, this will take time to happen as people are still not ready to make use of this when they've relied on Fiat and credit cards for a very long time. Just my opinion