I love my Motorola g53 that I got brand new for $20 that has a headphone jack, a radio, fingerprint sensor and more!!! It's like actually more featureful than a lot of expensive phones lol, and it's not even slow

Tar files themselves are just containers, the second extension is for the compression tool used to actually compress the original tar file :3 tools like gzip (hence .gz on some tar files) usually do the tar and compression steps in one :3