None of this is a big deal…
None of this is a big deal. A spare tire is VERY easy to add. I too have a 2024 impreza RS and have added a spare tire. Wheels and tires are not vehicle specific. All you need os the right combination of rim\tire size, wheel hub size, withe the correct lug pattern and offset. Its not rocket science. Any tire shop will be able to help you. There are also aftermarket companies that sell everything as a kit, along with the wheel\tire combo, tire mount, hardware and new foam trunk well insert to get it all in there just like OEM. If something so incredibly simple is a deal breaker for somebody, they must live an incredibly easy, sheltered life. I sorted this out myself in about 10 minutes. Ordered some parts and did the install in another 10 minutes. A spare tire should not make you reconsider an entire car. That is insane to me.