No, but like everything in this world, there are times when things don't work for everyone. People buy cars all the time, same model, same car dealership, same everything, one works, the other is a lemon. It happens.
Upgrading to W10 is not something that has too many issues for most people. There are those that have had problems, they tend to be the ones who comment online while the ones it works fine for don't say much as they have nothing to complain abaout.
So i am telling you that in my experience I have had no issues worth writing about, in fact it has worked quite well, is stable and runs all programs smoothly.
I am not saying that some people don't have issues, I am saying that just reading the internet is going to throw up all the problems people have had for whatever various reasons but that this is not necessarily going to give you the right information, just a biased viewpoint. So I offered my "limited" viewpoint: I have had no issues that would cause you concern about switching, in fact it works better for me than W7 or 8 ever did.