Boot space is getting smaller like you say. Your E-class wagon has a monster of a boot. I was pleasantly surprised by the Solterra. I'm looking forward to trying out the new Electric Outback that's coming out next year. The ID7 GTX is a nice looking car, but I've been enamoured by the ID Buzz since the first concepts and now with the GTX available, ticks all the right boxes for me. Living in Norway - I can't live without a decent AWD system.
As to the OP @Dannyyy - take your child seat and golf bag if you can when you test drive. At least here in Norway, they let me test drive cars overnight so could take it home and try.