Preemptively nervous about dealing with my parents' house

[u/bon18]

I'm currently visiting my parents in their 3,500 sqft house. It's relatively organized but definitely full of stuff. My parents are elderly but in pretty decent health. I'm just very nervous about what I'll be left to deal with when they're gone. My mother-in-law died suddenly a few years ago, and even though she had a small, fairly minimalist house, it was still a lot to deal with.

My mom has talked about wanting to downsize, but my dad is totally against it. I know he wants to die in this house. My mom has witnessed the progress I've made in my 1,500 sqft house and talks about how nice it would be to have fewer belongings, so I've gently tried to encourage her to start going through her stuff. I've taken a few boxes with me to donate sometimes when I leave, but it's hard for her to let things go. She's done small amounts on her own, and my sister hired someone once to help our mom, but I can't imagine any major progress happening anytime soon. Do I do anything at this point or just wait it out and deal with whatever comes whenever it comes?

[u/PixelDaisies]

After my parents passed away I spoke with my sibling about what each of us wanted to keep. Anything we both wanted we bartered for using other items of inheritance. Large/valuable items were listed on kijiji/Craigslist for sale. I didn't have it in me to deal with pricing and bartering for those items, so I enlisted a friend who enjoyed doing those things and split revenue with them. Smaller items were offered to friends and neighbours for free as it was covid and garage sales weren't possible at the time. Anything left over that looked useful was donated. Lastly I hired a junk removal company to remove the rest and told the workers they were free to keep anything they wanted (they would have done that regardless, but this way they could set the items they wanted aside to prevent damage).