It would great to see some actual experiences here, so we know what to look out for. I haven't seen many, if any, complaints about oil usage with the new gen ('18+). We go up into the mountains (or used to, LOL) and that means descending down from the mountains afterwards, with a lot of engine braking. I haven't observed any oil loss.
I just did a 1650-mile road trip to the eastern sierra from san jose, that's over the sierras twice and up into the white mountains twice. my 2016 crosstrek has more than 98k miles on it now and I change oil an 10k-mile intervals, and I drive hard and offroad. last oil change was at 90k miles. i'm down maybe 1/2 quart. next oil change at 100k miles.