There might be applications for much smaller transformers in UI design.

Like for example

- did the user tap the wrong location on the screen because their device was physically jolted, and can you correct for that, considering you have access to accelerometer in HTML5

- does the user keep repeating an action (checking every box in a list of e-mails) and can you extrapolate the rest of what the user wants to do

- did the user bounce because you popped up a stupid intercom box or newsletter popup, and did you learn anything about what you need to do if you want to retain this particular user in the future

these kinds of things could be done with hundreds or thousands of parameters or less