https://matrix.itasoftware.com/
Playing with this version, it's a little easier to use, but I don't see any functionality not in the regular version. Still, if it means Google is investing in Matrix, that's a good thing. I always worry at some point it will be killed.
The new design in the OP is still decent compared to the alternative websites, but slower and harder to use compared to this original design (to me, who had never heard of Matrix before).
It's a shame that this is going to be gone soon.
This isn't Google investing in Matrix, this is a group of people who work at Google using their spare time to rewrite the product so it doesn't get taken offline.
If anything, the lack of a dedicated team or resources is a strong indicator that Matrix will be on the chopping block at some point in the future.
Error: Service Unavailable for me.