We have 4 kids as of Dec 28 and have a 4Runner with 3rd row. It works fine for kids but it’s tight for adults. I am curious to see how the Grand Highlander is in the back.
We have had a 2019 Subaru Ascent since new my wife has put 60k trouble free miles on it. Took 4 adults on a 19 hour road trip had tons of room. We have bucket seats in the middle row which make it easy to get in the back if needed.
Hate to admit it but I like the Ascent its a nice vehicle.
We have a 2022 Honda Pilot and it is great to drive with pretty decent gas mileage. It has a lot more room in the third row than the Highlander. We looked at a Grand Highlander and it was definitely more comfortable in the third row for adults than the regular Highlander. They didn’t have any in stock that were not pre sold so I can’t tell you how they drive. We had a 2017 ford Explorer when we bought the Pilot and the Pilot has way more passenger room. Good luck!