Not entirely. Pluto likely does not have a magnetic field to shield itself from the solar wind. If the Sun’s increased activity increases the solar wind then planets like Earth wouldn’t be effected as much.
New Horizons should have some instrumentation to answer that about the mag field. I would suspect Pluto does have a mag field while the atmosphere is in the gaseous phase.
Does anyone fear the sun might increase to a quasar? Is there any speculation there is a black hole somewhere?
Excuse my ignorance, I’m not knowledgeable about this stuff but it seems if the sun is becoming more active perhaps it could go as far as an explosion?
But I have faith in this forum for knowlegeable people in these areas. I’m constantly amazed at how much I learn here, so I thought I’d throw this out.