> I would assume TXSE would want quick access to that order flow
Perhaps Texas could use a different trading model that doesn't require ultra high speed trading.
Matt Levine often mulls the idea of a system with a trading window that doesn't let the fastest connection to the order book win. Perhaps an order book that works at human speeds so humans can trade too (I can think of a few ways to do it - but would need modelling to try and figure what actually works). He points out that most trades are done in the last hour, so really trading only needs to occur once a day.
The issue is whether a market trading system can be designed with suitable restrictions that beats the current market design (for listed companies and for traders).
Designing markets is hard because you have to assume every player is selfish and only cooperates where it is to their benefit and will defect or cheat if the incentives of the market encourage that (Enron in the California energy markets).
Unlikely since SEC would need to approve of a different system of market trade incentives.
Edit: Personally I would like to see an exchange that was more international. I'm from New Zealand and our good businesses often list on the Australian exchange rather than the NZSX. The system of ADRs for other countries feels like a massive hack.