EDIT: I saw that this post was already addressed elsewhere and was going to erase it but there were already replies.
original text: I was wondering about this today as I saw that 6.7 beta is out. Seems like we will be running out of decimals soon.
It's not a decimal fraction, so after 6.9 comes 6.10, 6.11, 6.12...
See https://community.logos.com/forums/p/116826/767017.aspx#767017
