An expert indeed. He wrote this on the second day of the eruption.

He says
"We stopped monitoring movement at the Cumbre Vieja in the early 2000s, so have no idea what has been happening since then, and especially in the build-up to the current eruption. Nonetheless, it is important to recognises that the west flank of the volcano remains an actively unstable rock mass that will fail at some point.

We continue to be confident that a major, tsunami-generating, collapse is perfectly possible - even probable - at this volcano, whether or not any tsunami impact is localised or extended. WE DO NOT, HOWEVER, PROPOSE THAT IT WILL HAPPEN IN THIS ERUPTION. It is likely that when the west flank fails, it will do so during an eruption, but this could be 10, 30, or 50 eruptions down the line. The chances that collapse will occur during the current eruption are very small, but we cannot say they are zero."