In my experience, Win 10 is neither buggy nor slow. All of the computers in my house (8 at last count) are updated regularly and have only ever had one time where an update caused a problem on 1 machine, it could no longer access the network. In that case, I updated the NIC driver and was was well again.
I can't explain why some people have problems while the majority of others don't. I personally believe it is due to buggy drivers from hardware manufacturers.
I also install all of the latest Win 10 builds as soon as they come out and have never had a problem with one of them making it so the machine could no longer boot. In fact, I am currently installing build 17758.1 which is pretty close to the final version of the full update that will be released next month.
I can't explain why some people have problems while the majority of others don't. I personally believe it is due to buggy drivers from hardware manufacturers.
I also install all of the latest Win 10 builds as soon as they come out and have never had a problem with one of them making it so the machine could no longer boot. In fact, I am currently installing build 17758.1 which is pretty close to the final version of the full update that will be released next month.