Need a backpack pep talk

Hey all,

I've been eyeing getting a Wapta 30 soon. Next big trip is TMB this summer (huts not camping).

I also own a GG Mariposa which I've used on several weekend trips and the JMT this summer. It a fine bag but before I do another thru (who knows when) I'll probably get a new pack. It's much better than my Osprey Kestrel 48 which I loan out when someone needs it. I also have an Osprey Talon 22 for day hikes.

I thought I was gung-ho about the Wapta but now I'm wondering if I should just use the Mariposa. Convince me to get it (or not).

Related--what do you all do with packs that you'll basically never use again but that don't have much resale value. Thinking my original Osprey from 20+ years ago that has to be 5 lbs.