Back when I was a teenager, people in their 20s were “old farts.”

Nowadays, I look at people in their 40s, as “kids.”

Here’s my first ever engineering project (1987): https://littlegreenviper.com/wp-content/uploads/2022/07/TF30...

I was 25, at the time, and a fairly newly-minted EE.

An anecdote for you...

In Summer 1997 i was 24 at a family reunion, listening to my grandmother and several other seniors talk about some recent interaction my grandmother had had with a delivery person. One of her friends asked her, "how old was he?"

i'll never forget either her response or my jaw-dropping which followed:

"Oh, he was a _young_ man. About 50, I guess."

(Yes, she actually stressed the word _young_.)

One of these days, maybe as early as your mid-/late-40s, you will be consulting with your a medical doctor and realize that you are the oldest person in the room.

You'll still feel young too! It's really weird when you get to your mid 30's and realise that all the 20-somethings view you as old