This. It’s a bike that can do anything and everything. Almost the lightest, almost the most comfy, almost the most aero. You’re not sacrificing anything and you’re not making any compromise*.
Being short or long distance, road or the odd gravel ride, mountains or flats, you will never find yourself saying “oh I can’t do that on my SL6”. So if you have only ONE bike, that is the natural choice.
Otherwise, the Venge will be a great choice too,I’ve not read one single person complaining about it, but you might, at times, find yourself a bit limited in what the bike is naturally great at.
*on this forum, loads of people get way too excited about minuscule wattage savings and sometimes this doesn’t allow to see the broader picture.