More than 10 years ago I bought a Sony Radio Alarm Clock. For the time, it was an excellent device.
After years of abuse, tuning to an FM station became problematic. In 2017, the buttons stopped working. I could have fixed these, but I thought it would be more fun to replace the guts with a raspberry pi. However, the final build is larger than the original case. So, I tossed the case.
Of course, all of the functions of a Radio Alarm Clock can be accomplished with a SmartPhone.
There is no point in building a Radio Alarm Clock. A home built alarm clock radio costs way more than buying one and it took a crazy amount of time to build. But this project made me feel like a kid again and I learned a lot.