How does endgame FEEL?

I can do as much research as I want, and I do, to find out what endgame is comprised of. There seems to be a gargantuan amount of content, which is very exciting to me.

That said, how does it actually feel to those of you doing it? Does it feel like a slog? Is it satisfying? Do you feel like it’s pointless knowing that there likely will never be anything beyond it?

I’ve returned after a bit of a break and I’m just getting geared up but one of my concerns is that I’ll gear something out, then get stuck in the endgame treadmill and burn out without knowing there will be anything else coming. However, I believe all of that can be mitigated by a thriving fun and social experience, and as such the journey becomes the goal.

That’s why I’m here asking you who are doing it - is it a ton of fun?