The Simpsons S23E04 end credit song Replaceable You

The Simpsons Season 23 Episode 4 (23x04) called "Replaceable You" songs list:

Bart building the robot
Future Shock - Curtis Mayfield (youtube)

Old folks are enjoying Bart's robot toy
Vivaldi - Spring (youtube)

Ending credit title song
Golden Years - David Bowie (youtube)