Another ElderGay here - same story for me. Most all of my friends were women up until my 40s. My long-term best relationships now in my 50s are all with men. Men whom I've known for many decades and are now reaching out to each other to share life dramas, not making drama for each other at all.
The women have drifted away into their own relationships or their own singlehood, and when I do catch up with them, there is always some reason I'm being told I'm at fault for not properly maintaining the friendship they were enjoying from me, and I have to think back on it, and realize they are only half right. Their demands for extra attention, time on the phone, paying for things, and taking a side (whether friendship or politics) was important to them. In short, female drama. I just lost energy to maintain it, and found that it wasn't worth it. I'm supposed to remember their birthdays and try to plan something with or for them, but none of these ladies remember my birthday at all. I don't care if people remember my birthday, I just care that I'm not getting any of the same energy or attention back that I give to women.
The men in my life were usually fun, yet aloof and 'cool' throughout my 20s and 30s, but as our parents die, we get illnesses, and other friends die, or we just want to talk to someone about life's b.s. - we have been turning to each other. One of my old friends died last week, and it's been all the men reaching out to me, and to each other to talk about him, pay tribute, cry, tell funny stories about him, talk about the obituary. The women are nowhere to be found here, and barely have a connection to him anymore. His wife, mother and daughter, however, are amazing women, and have included us in the grieving process, so there's the exception.
Sorry, but I think women's maturity peaks in their 30s, and they don't grow much more after that. Men take a long time to mature, but when they do, it keeps going. That's my very general take - and yet there are of course exceptions.