Even if it is beneficial, the user might still want to disable it. (Possibly a option in the browser for manual/auto calculate; if manual, then events are disabled until you push submit or recalculate. This might improve speed, too. Another thing that might be useful may be ARIA mode (which can also have other advantages, although other things are needed too anyways).)
Saving a partially filled form is something that should be a feature in the browser, you can do "File > Save Form Data" (and then specify the file name) and "File > Recall Form Data".
I generally disable JavaScripts. Sometimes the web page will still be displayed if CSS is also disabled (and sometimes I want to disable CSS anyways), and sometimes links to original data, etc can be found if you view the source.
Saving a partially filled form is something that should be a feature in the browser, you can do "File > Save Form Data" (and then specify the file name) and "File > Recall Form Data".
I generally disable JavaScripts. Sometimes the web page will still be displayed if CSS is also disabled (and sometimes I want to disable CSS anyways), and sometimes links to original data, etc can be found if you view the source.