I actually don't mind the butterfly keyboard. Weirdly I seem to type faster and make fewer typing errors on it. I've had no issues so far with my 2018 MBP (i9 32GB 560X) *knock on wood*
What really bothers me are the touch bar and trackpad. Usually when I'm typing my hands hover over the keyboard. My fingers just slightly touch the touchbar and either hit the esc key (especially when on a browser and my fingers are on cmd-W to close a browser window) or the siri button (when I sometimes overreach a bit hitting the delete button). It gets quite annoying at times. I really hope they go back to physical keys for the function keys. At times my thumbs hit the trackpad and move the cursor somewhere else and I have text in places it shouldn't' be. Honestly I do have an unorthodox way of typing, so it might be me, but I'm used to it and it never happened on my older 2013 MBP.
What really bothers me are the touch bar and trackpad. Usually when I'm typing my hands hover over the keyboard. My fingers just slightly touch the touchbar and either hit the esc key (especially when on a browser and my fingers are on cmd-W to close a browser window) or the siri button (when I sometimes overreach a bit hitting the delete button). It gets quite annoying at times. I really hope they go back to physical keys for the function keys. At times my thumbs hit the trackpad and move the cursor somewhere else and I have text in places it shouldn't' be. Honestly I do have an unorthodox way of typing, so it might be me, but I'm used to it and it never happened on my older 2013 MBP.