Hi all. I am a newbie here as well as to Bitcoin world. So my question might sound stupid... anyway, I've heard that when the new Antminer comes, the old ones are not working to their full effect, or mining not as profitable as they were previously. So for example, we have now antminer S9 which let's is making a 100$ profit per month, when T9 will come would be S9 less effective just only because there is a new machine out there? So any ideas? Sorry for my bad English. Thanks in advance!!!