I'm 50-ish, been married 30-ish years, and haven't told my wife.
10 years ago, she found a few items of clothing, and I explained it away as just a temporary thing. She hasn't brought it up since, and I haven't, either. But based on her reaction at that time, I believe that the revelation that I still CD would not be well received at all. Now, with kids, the stakes are even higher.
So, it will remain my private thing. Yes, I admire those who've come out and been accepted. Sounds wonderful, and I admire you. But for me, it would bring big problems and I already have enough of those.