I am reading a 2013 article about the "Little Ice Age", a group of researchers (contentious at the time) reckoned it was caused by massive volcanic blow-outs. So went looking for it. Way bigger than Tambora 1815 which was followed by a year without summer. Karakatoa (West of Java BTW) was a mere muted rumble, albeit heard 6000 miles away. They reckon from the ash deposits centring on Segara Anak crater on Lombok, the 1257 explosion contributed to the long years of cooling.

Now my point here is we could see another such catastrophe (killing millions some way).
Because the earth's crust is like toffee on global scales. It is softening as the planet warms. And anyone who thinks 1.5?C (aka 2.5) ain't relevant, please declare a datum temperature to calculate the percentages. If you can!

Magma can push though more easily. And if it happens at a coastal location water gets in and becomes super-heated and expands suddenly. Boom!

And permanent winter follows. Crops fail. People starve. (did I mention acid ran?) And the Russian people for one ain't gonna support Putin after!

And it won't be the government's fault except at the ballot box!

It won't alter the basic problem of CO₂ build-up, but could buy us time. If anyone is listening!