This is total comedy. By your own admission you do not know much about the technology involved yet you have decided that you do not think it is reliable. What that had to do with the OP or one of the many sub-topics is also a mystery.
In essence, TLC is a lower endurance version of MLC. As Anandtech have proved many many times that consumer users are not likely to use a fraction of their NAND endurance, a market for TLC does exist. That market will include enterprise clients where all of the heavy lifting and data storage is handled by a server, or low power users who use the internet, office and ebay.
Next time I build a rig for somebody depending on their usage model, I would certainly consider the Samsung 840 now all of the 830's are nearly gone.