In reply to Andreas Nurbo.

A good point. The Classic editor is only installed by people to establish a pre-emptive bulwark against proposed future changes.

Classic Editor installs is a subset of Gutenberg installs.

Even if there are only 200,000 Classic Editor installs to the reported 250,000 Gutenberg that means there's an 80% rejection rate after trial!

Gutenberg plugin installs show us the number of "curious people taking a look at what the future holds". They are staring into a crystal ball, as they were asked to.

Meanwhile Classic Editor installs show us "Curious people who took a look into that crystal ball ... and were so freaked out by what it showed immediately started building a wall against it"

Not great.
I think this project needs a bit of tweaking to meet user needs more effectively.