Well, after some time, version 47 is out, it mostly brings improvements to existing features and elements, as well as a new tool called wind
It is also installable, by pressing "Ctrl+I" on your keyboard, you'll install the Powder Toy so that you can open stamps and downloaded saves more easily.
O2 no longer does oxygen fire in 47.3. Could somebody please explain why it was removed. H2 is literally O2 now- they burn at the same tempurature, they are both gas, their flames both produce no smoke and they both need to be present to produce water. The only difference I see is the colour.