I have had one on my 2015 Deluxe Les Paul (100th Anniversary Edition) now for a few years. When I bought it, I asked them at the store to take it off before I took it home (because....you know....I'm a real guitarist....). He convinced me to leave it on there for a month and bring it back in after that for my free service and set-up and they would take it off then. Well.....needless to say I still have it on there. I have multiple guitars and I use an electronic tuning device of some sort on all of them (As we all do - unless you use a concert tuned piano or tuning fork).
NOT once have I had an issue with it, and I still joke with the other guys on stage, "are you all still tuning up"? In fact when playing my acoustics or another electric I wish I had it on there. I have been playing guitar for over 30 years and have performed all around Australia including the Opera House - not boasting, just adding some creds. Can I tune a guitar? Yes, perfectly. Do I love having a robot do it for me? Absolutely! If I could afford a roadie to do it for me and I keep playing guitars that someone else tuned, then I would also do that too - Just in the same way that major touring artists do. Do you think that Sambora couldn't tune a guitar?
I think there is nothing worse than waiting for a "real guitarist" to tune his/her guitar after shredding and making everyone wait. If the songs starts and you are out of tune - you mute your guitar - press the button strum - and fixed quicker than I could write this - unmute and keep playing.
My take is this - Stop being "a real guitarist" like I considered myself only to realise I was actually being "a real W@&ker!"
By this I mean no offense - Just simply stop judging something on the basis of your bias. And on the merit of how this can be applied.