> In the end, maybe the 95% are feeling so uneasy, 10% of them leave to another app, that just has a 'Go' button again, so they feel confident, and more happy.

You can't knowingly hide from choice: the existence of a different application that only has the Go button is not an escape, it is just yet another choice. The exact same story you described within the microcosm of the single application now plays out between the two applications, as the prospective user wonders why the application with the checkbox exists, as its very existence implies that maybe they should carefully consider whether they should be checking that box. Only now there are even more complex issues to decide: do the two applications even work the same in the situation that don't check the box? Now, even if you kind of think you want the comments, maybe you should be using this new application because maybe it works better in some way you don't quite understand... so you have to research the two applications or even test them against your files, coming up with your own (potentially flawed!) metric of comparison.

Your model thereby only works for the percentage of people who have only heard about one application or the other: anyone who saw both applications has also seen the checkbox, and the choice inherently must have been decided in order for them to now be using the second application. Even if the first application is discontinued, the user will forever wonder if the newer applications they are forced to use instead are flawed because they don't have the checkbox, and despite never having actually checked the box, might question sometimes why someone would have even added such a checkbox were it not sometimes a good idea, and now the uneasiness simply consumes what they are working on: the task of minifying JavaScript itself maybe can never be satisfying. To the extent to which people actually are "leaving" an application because it has too many options, I thereby argue the real problem is not decision fatigue or crippling doubt, but in fact simply "confusion": they don't actually know what all the options do, or find the process of setting the options frustrating, and thereby move to a simpler application not because it frees them from having to make decisions (as again: decisions can only ever accumulate, they can never be taken away), but because it makes the process of actually using the application more straightforward and less cluttered.

You also can't model "limits" as removed decisions: Twitter limiting me to 140 characters actually makes my word choice really matter... I end up having to draft multiple versions of what I need to say in the hope of finding one that I can whittle to under 140 characters. I have friends help me decide which of the variants conveys the idea the best, and sometimes I have to decide to split the message into multiple parts (but as each will be replied to and retweeted separately, deciding what information needs to be replicated in both, but in a way that isn't awkward, is itself a difficult decision). I often just go "bah, this is too complex", and not send anything; whereas on Facebook or reddit, where I have no length limits, I tend to just type something and send it: with this comment, while I did a little editing afterwards, it was nowhere near the ordeal that happens when I have to start making decisions due to hitting a limit. I would in fact argue that all limits lead to decisions: a limit is effectively a constrained resource, and now you have to decide how to spend that constrained resource to best accomplish your goal; a system that does not impose a limit frees the user to always do what felt most natural in the moment, however wasteful. The argument with Twitter not breaking free of their SMS-limited history is usually along the lines of either "if the messages are so long people won't be able to quickly read a bunch of them", not "giving people the ability to type a lot means they will not bother typing at all"... I think we can attest to the shear volume of trite YouTube comments to demonstrate that people are quite happy stopping typing once they've stated their peace ;P.