I never really considered my 2015 Sienna AWD to be my forever car. Although it does all that I need, passenger seats for kids and grandkids, cargo mode (helping my daughter move next week so will remove all rear seating), and my favorite - camping mode. Also have a camping set-up I built that provides me with a bed, gear storage, curtains, etc. I've had the van out as far west as Montana, in a few months planning to make it out to Washington state. Specifically chose a Gen3 with 6-speed transmission and 2grfe for reliability. I bought it with 76k, now have 121k, still no significant issues. Had the dealer replace the spark plug last Fall. Last week I replaced rotors/calipers in anticipation of pulling a small popup camper. Has a 2" lift kit, +1 size Michelin Defenders, hitch, wired for a trailer with ebrakes. Other than routine fluid changes, no issues to report. Living here in NC the van is rust free, but has a few scratches here and there.
Cons - I'm not thrilled with the mpg, 24 to 25 cruising on the highway, 19-20 in town if I drive carefully. It feels like a heavy boat around town. Tires have 22k on them, might last 30k. While the seating arrangements are highly flexible, and the middle seats are easily removed and third row seats removable too, they are heavy and usually strain my back to pull them all out and put into storage. Same for re-installation.
Pros - It's super comfortable on road trips, reasonably quiet, reliable, lots of flexible space. You can mount an awning on the roof rack without too much trouble.
Funny thing is, I am 69 now and figure I need to find my forever car, thinking a Grand Highlander Hybrid, or Sienna Hybrid could be it. Both are suitable for small trailers, can be slept in, and get good mpg.
Not sure if I want, or can make my Sienna last another 10+ years.....