It pretty much does. What is the driver here? Why should it speed up?
Yes. And venting pressure.
As much as what has built up in the magma chamber and all of it. This isn't a kaboom-type eruption.
Volcanoes go through stages of activity. Eruptions are when it vents off the pressure. At most it becomes a Kilauea situation where it just keeps oozing because it's plumbing connected all the way down through the crust. This one will probably stop here in a bit once the magma chamber exhausts itself for this round, the plumbing solidifies, and the cycle starts over again. It's how these things work.
Whatever you say Mister "Lava tubes are 10000km long and reach across continents".
https://youtube.com/watch?v=kIegAa26lX8