I guess I could see Di2 for front shifting. Rear, meh. Honestly the ultegraSL I have now is great. I put Rival on my bike for awhile and took it off. Didn't like the effort for the double tap, and the "moving lever" thingy is better on the showroom floor imho.

I need to adjust my front ring shifting, and have needed to for weeks. Doesn't really affect my riding @35 hrs/month. ymmv.

Merlin, I'd buy 7800 since I've only got one nice road bike. If I was buying a 2nd bike with all of the money I made (saved?) self-insuring myself, it'd have Di2.