Going strong
Definition 1 of 2
Pro Tip 1/3Longevity Emphasis
Emphasizes the length of time something remains successful or healthy. 
The family restaurant is going strong despite economic fluctuations.
Pro Tip 2/3Success Continuation
Highlights ongoing achievement and the absence of decline. 
Ten years since its launch, the software is still going strong.
Pro Tip 3/3Health Vigor
Refers to someone's vitality and strong presence, often despite age. 
At 80 years old, the marathon runner is going strong.