Everyone wants to learn English, not just to sell or talk to me, but to talk to each other. It's clearer to speak a language they both don't know so well, but at the same level at least. The common tongue from before the Tower of Babel has returned. It's possible to talk to people from Japan, Australia, Argentina and Bulgaria in the same language. This is surely good all round.
Information is cheaper, meeting people more easy and economics more efficient.
Yes, no problem. There are differences between the two, but they are really stupid to accentuate. We have to print double labels when the only change is a few accents or letters. We don't know why we shouldn't just call it Czech-Slovak language. This is just the point that I want to make.