I started my career at Motorola, I saw so many senior(read: old) engineers working efficiently and staying updated. They're eager to teach newcomers. It gradual

I started my career at Motorola, I saw so many senior(read: old) engineers working efficiently and staying updated. They're eager to teach newcomers. It gradually stopped when the outsource era came. I notice over the years a few star players in their 50s and even 60s are either unmarried, or married without kids. I have kids and I'm in my 40s, I plan to work until 65 for coding. If nobody hires me, I will try to get something done(SaaS?) or consultation from home. I probably don't need that income to survive(by then the kids will be out so the finance burden will be more tolerable). Working is the meaning of life for me, it has nothing to do with my age or if anyone hires me. I will keep studying and working no matter what.