Adaptive TCP optimization - how to understand?

So you mean "uses adaptive TCP optimization" = TCPExpress? I am bit lost here then. If TCPExpress can adapt to any client connection conditions using one profile why there is so many default profiles (with names suggesting usage - wan, mobile etc)? Adaptive suggest that one profile can accommodate all types by dynamically changing options (I guess that fine tuning of options in profiles is what makes given profile best for given type of client connectivity) - but I guess it's not working this way. I understand benefits of separate client and server stacks and profiles but my doubt was about client side profile that can provide best performance for all types of client connectivity types. I can as well see that plenty of settings in TCP profile is allowing for dynamic adjustments on per connection basis (at least I understand it like that) Still my question was more about why there are different TCP profiles configured and if there is a good reason (for sure there is) what is the best way to switch profiles online for VS - and I guess it's not possible? So if there is VS to which clients with different kinds of Internet access are connecting how to choose best profile on the fly - redirect to another VS, using virtual command in iRule, some other way? Probably I am mixing something up but it still is not clear for me. Sorry for long post but I am still learning and this looks like quite important are, would like to understand. Piotr