I personally prefer the American tipping culture, especially given so many in our society seem to expect to get rewarded for minimal effort. If we had a society where people were expected to give their best effort no matter what then we wouldn't need tipping.

I've seen accounts of restaurants that got rid of tipping. Some seem to have made it work, others lost their best servers who knew they could and would make more at another establishment. I don't know of any controlled statistical study in the US -- and you KNOW the proponents of abolishing tipping would push one out if it really worked here.

As far as DoorDash, GrubHub, and UberEats go, I refuse to use them because they all screw the restaurants. I even refused when I had a $60/month credit for DoorDash from my credit card company. I treat periods when I'm too sick or the weather sucks too much to go out like I would a snowbound emergency -- I dip into the stash of pasta, rice, and canned goods. You know, that same stash that some of us keep in case of emergency? Some people here are starting to sound like the folks who complain they're starving because we had a 3-day blizzard and they're out of food, toilet paper, etc.