In avionics life, nine years is a long time. That’s how long Garmin’s G600 retrofit primary flight display has been on the market. While that’s long enough for a product to lose its tech edge, Garmin generally doesn’t let that happen.
Luckily, periodic software upgrades can give an otherwise aging product a new lease on life, although FAA certification can limit major changes without requiring a time-consuming and costly recertification process.