There, I said it.
I didn't care about Spectre, Meltdown, or any of the other obscure timing side-channels that came after them either, because they relied on so much detailed information about the environment being attacked that you'd almost certainly be able to get the information you wanted by some much easier way.
Attacking something that doesn't seem to be in much use either doesn't make me any more worried either. Go after e.g. TLS, SSH, AES, RSA, etc. if you want to get our attention, but I suspect that trying this in practice, you're going to be overwhelmed by all the other sources of noise --- especially over a network connection -- that you won't be very successful at all. They mention 36h and 89h to get the key (few dozen bytes), and I assume that was in a basically ideal environment with nothing else to measure.
Those of us familiar with hardware would know that things like this are pretty natural; but unlike these people, we don't go feeding the paranoia machine and driving us even more towards the growing dystopia.