Yes, you are. I had nothing more advanced than Bluetooth, drove a rental car with Android Auto support for a week, and immediately went out and replaced the head unit in both of my vehicles with one that supported AA and Carplay.
The most obvious benefit is navigation. You get the full power of Google/Apple maps in real time, and you never have to pay your car OEM for updates.
Navigation is also integrated with everything else. It knows that I have an appointment on my calendar in half an hour and suggests that as a destination without me having to retype it. It knows that in the mornings my most likely destination is "work" and my most likely evening destination is "home". It knows what brewery I like to go to on Saturday afternoons and suggests that too.
Voice control is another huge one. I don't have as much experience with Carplay, but with AA I can use Google Assistant for nearly everything and keep my eyes on the road.
It makes the connections trivial. Most modern systems should support wireless Android Auto - when I get in the car it connects over WiFi automatically without me doing anything. Even on older vehicles I plug in one USB cable and am good to go. Compare this to my bag of hardware I bring on trips where I'll have a rental car - you need to find a mount that works (sometimes a.dashboard suction cup, sometimes a vent clip), get the phone in a good angle where you can see it and it can get a good GPS signal, go into the car and pair it to Bluetooth, attach the charging cable and make sure it's not getting caught on anything, and so on.
For calls and texts, it just works. I've fought with Ford Sync and other proprietary systems just trying to get it to recognize names. The stock unit in my Subaru was so bad that it couldn't keep "Firstname Last name" and "Othername Last name" as two separate identities because they sounded alike, so I had to map half my family to Harry Potter characters. With Google/Apple, no such problem - just say "Call Firstname Last name" and it works every time.
The system integrates with whatever background noise you want - music, podcasts, and so on. It makes everything automatic and painless.
Android Auto gave new life to my old cars