Wow 144K TPS with the Lower Level Protocol, that's pretty insane. Specifically since it's not even live yet and still being developed. Combine this with more second layer scaling and the results could be immense. Awesome work.
work and the truth is very interesting made by the creators of this project. but i think that scaling as you ask is simply unrealistic. can of course be in the plans it is possible but the code will have a lot of resources to demand and that part of the 144k will be lost in the course of work.
We don't need layer 2 scale ability, 3DC will be scalable as layer 1

Here's some more info:
Colin Cantrell [1:57 PM]
The transaction capacity on the ledger level is limited by the data rate defined by block size and block times. The LLP is the network layer which handles much more than VISA - a full 3DC will be required to get the ledger data rates to this level.
Colin Cantrell [3:22 PM]
Based on available data rate yes - 655 tx/s is the target. I'll release benchmarks on that when I'm testing Tritium Blocks. This can easily be changed by increasing block size and processing transactions before block lock - but that's a base number I'm focusing on in the near future to keep us scaleable single dimensionally until the larger components of the 3DC is deployed through Amine and Obsidian.
The LLD is also a key to this - since the more transactions you have - the slower the database operates. The base layers (LLL) are fundamental in making sure we don't get any bottlenecks as we build up the stack
This is basically the starting point of Tritium (but then we have Amine and Obsidian too)