Sure, you might bear it willingly out of that love, but you don't have to like a new tedious, dirty, frustrating project just because you love(d) the person who left it to you.
To take it a step further, the junk is usually a result of your loved one's insecurities and fears. It's largely a reminder of a burden you wish they hadn't even had to carry. Now that you have to carry the results of it, it makes sense just to want to be rid of it all.
Honestly the way I see it my mum knows me well enough. If I'm instructed to do anything like a tidyup it will be done quickly, efficiently, and without emotion.
Take a picture of your nostalgia items and bin them, the emotion is in the memory anyway. You'll look at it just as infrequently but at least it's only taking up bytes now.
Extract the useful-to-you stuff and get someone to cart everything else away with a "you get everything for £500 if you take it ALL away" deal.
If she doesn't want this I imagine my sister will be in charge, haha.
For me, it will only be a sad single day project as part of the grieving process. Hundreds of hours is just a totally different story.
My partner has inherited a big project and collection that meant everything to their Dad. He would always say, I want this taken on etc. But when push comes to shove, the prospect/reality of inheriting someone else's hobby/business, which requires years and years of work with no return just feels more and more bizarre and absurd. But you feel indebted and horrible not carrying through with wishes.
Never mind a pile of junk. You can just inherit a big pile of problems.