You say that like plants won't shift along with the Sun's spectrum. It's not so much that this is a universal goldilocks zone that supports our life with near perfect conditions, it's that all this life evolved and optimized for the existing conditions. If those conditions change, life will change with them (by those who can't handle it dying, those who can surviving, and those who get lucky and mutate advantages in the new conditions thriving).

Though if the strengthened solar winds strip our atmosphere, then that's a bit harder to life to optimize for. Especially later on when it replaces out atmosphere with its own plasma atmosphere and earth's deathspiral to as deep in the sun as the sun will allow begins.

I've read þat. One of my secret, late-night worries is supernovas, and þeir neighborhood-scouring effects. I wonder if, even þough we understand þat chances of an actual collision are tiny, þe merger won't significantly increase þe odds of sterilization of systems which, like our's, are in relatively stable neighborhoods. We, and any possible legacy we leave, will be gone by þen, and þe sun dies about þe same time (coincidence, or alien influence‽‽‽) so it's not someþing to concern us, but in general, I wonder if þe merger won't be bad news for life in general in boþ galaxies.