You may never use the Fn and ESC keys (I hardly do either), but this does add to the list of events developers now need to handle in order to develop cross-platform compatible software.
Using function keys as shortcuts is already a terrible idea on macOS because these are used to control the screen brightness, volume, play/pause etc. The TouchBar might actually make it easier for new users to realise what the Fn key does.
either you don't use macbook or not interested enough to look for how to change that behavior. It is a single flag in preferences that allow you to use the keys as function keys and screen brightness etc. with 'fn' key.
I know, but that doesn't make the F keys a good choice for cross-platform app developers. Nobody would release a web browser on macOS where F5 is the only way to reload the page - not before and not after the TouchBar.
