I'm debating whether to go eTap. I can get a really good deal on it, but I'm still running 10-speed on my bikes. I still have new 10-spd cassettes and chains. Granted, I could use them on my second bike, since I'd only be upgrading one bike.
And, since I don't have a compact SRM, I have been going with a Sram WiFli RD and 11-32 cassette for my mountain trips, so I would either have to run WiFli all the time or buy the WiFli RD too.
Any of you guys run WiFli all the time?