My car (Mk 8 Fiesta) didn't come with a spare wheel and for some reason cars with pano roofs (like mine) didn't have the option to have one when new. I was able to have one from my brothers 2006 mk6 fiesta when his was scrapped. I was worried a 14 year old tyre might be too old, but can't see any cracks or problems with it. Pics of it attached below. I certainly prefer a spare than goo and compressor.
My spare in my Fabia was still perfectly OK after 15 years being the boot. I did use it a few times, so very glad it came with one. Again No cracks or any problems.