Turning 30 was a milestone. Turning 40 took some getting used to. At the 50 mark it made me stop and think what that meant; if anything at all. A little over 6 months ago I made it to 60, still in one piece so I stopped counting years. A good friend will be 90 in July and still messes with a vintage sprint car powered by a Model B Ford 4 banger. He also still goes to work every day at the garage that used to be his and is now run by his 2 sons since he "retired" 20 years ago.
The common interest bonds us all together and not our ages. Young or old just enjoy the present and each other and share the knowledge.
