Should I feel isolated? I don't know. Do I feel isolated? No.
My only "gift" in life was/is the ability to use substitutes for things and be 100% satisfied with the results. So, for example, when I was in my late teens, cable TV was my substitute social life. And I was aware of it. And I was completely fine with that. When the internet came along and TV started to fade as the dominant form of social consciousness, I transitioned to that and was still fine with it.
So, as long as I am connected to the borg collective, I'm OK. Although I must admit that "social media" (Facebook/Twitty/Discordant/soforth) is not my cup of tea. So I don't know what I'll do when forums go away. I guess I'll have to finally break down and buy a Netflix account or something.