I upgraded to SRAM force etap 12 speed, after 5 years of 105 mechanical. I felt a little silly at first, but I say fuck it. If you can afford it and you actually are riding your bike (I do 150 km per week, used to do more but I had a kid) do whatever you like. It shifts perfect ever single time, never needs indexing, the charging is simple, fast and easy and it looks so clean having no cables exposed.
I fully understand people not liking electronic shifting, but if you can get your hands on it, its the best.
That said, 105 is hands down bang for your buck the best group set on the market. The difference between 105 and dura ace is like having two bananas in your back pocket. Everything else is the same.