Copy paste doesn't take time and it takes several seconds before you can put it on withdrawal tab if you wish to do a transaction by using Xrp, and I always use this for my transactions since as you said it's quite convenient for cost and efficiency which for sure people will like nowadays where bitcoins fee's are much higher. Although doge is good but for now it's out of my radar
Yes, you are right that copy paste take a little time which can be considered as not time but yet I do not feel comfortable on it and I think many people do not feel comfortable only for this additional feature.