Maintaining a car correctly has to do with replacing mechanical components if they're defective, develop sudden faults, reach the end of their service life, or wear out. Not just consumables, body parts, blankets, medallions, rugs, "angry bird" grilles, keychain accessories, hooter-sairen, neeli-batti, Android-sistem, etc.
Cars are made up of thousands of parts, and you do not want to be in a situation where you have a brand new POS economy box with no replacement parts, or none that you can afford. Look at all the Toyota Prius C (Aqua) owners scrambling to find scrapyard trash ABS modules and batteries for ridiculous prices, for example.
CV axles and struts are suspension components that you need to be concerned about.