[bityard]

> We don't understand solar "climate" enough to say that it's changing (cycle frequency, amplitude, etc).

We certainly do know a fair amount about the sun's "climate": https://en.wikipedia.org/wiki/Solar_cycle

The sun has an 11-year solar cycle where each cycle has a period of low and high sunspot activity and currently we are just starting Cycle 25 with a corresponding uptick of solar flare activity.