This forum upgraded to vb3.8.7
As you may already know that this is the final version of vb3.8.7, it has come to end of life.
I have installed it and found no templates changes at all from vb3.8.6.
So you are safe to upgrade and you can keep buying the 3.8.6 for your 3.8.7 forum. I will keep the price low for 3.8.x category.
And maybe next week I will spend some time to update the style xml just to reflex the new version.