For Moscow it is actually quite practical to rent a car if you want full mobility and not depend on taxis or metro schedules. It works well when you plan to move between different areas or make short trips outside the city, especially if you value comfort and time flexibility. I checked a service that allows you to compare cars, prices and conditions in one place so you can quickly choose what fits your needs rent a car in Moscow
https://getrentacar.com/en-US/russia/moscow it gives a clear overview of available options and helps decide what works best for your budget and travel plans.