To me, I feel like Static, in the greater sense, is about a fear or change and the desire for things not to change to not lose those happy times that often end up becoming nostalgic. "Things are great as they are, so why can't they stay this way? Why does it have to change? Why must it END?" And at the same time, it's about the fear of being left behind and forgotten in a world that is always changing.
I'm sure deep down we've all had happy moments we wish would last forever or ones in the past we wish never ended. This song feels kind of indulgent to me because on hand, I know we that things can't stay the same forever. People change, places change, we change and if we stay locked in a memory that is forever already lost we'll miss out on the new good memories. That said it's probably normal to not like goodbyes or change. I'm pretty sure that's a normal thing that a lot of living creatures (including animals) experience.
This song feels like a break from the world in the best way. Like it's like Miku is telling us it's okay to feel that way sometimes it's okay to feel overwhelmed by all the change and listening to this song feels like you're taking a little break with her. And yet the uncanny nature of the song also implies you can stay here for a little while, indulge in the past, in the nostalgia, in this fantasy of a "static" (as in unchanging) world but you can't stay here forever. And Miku in this song seems to know that. She wants you to stay... but she can't force you to. Instead, she simply says to come by again if you need a break and she'll be there. That's where this song feels comforting.
Wanting to feel wanted, wanting people to stay, wanting things to never change are all normal desires... but we can't stay in a static, unchanging world forever. But we can take a little break.
Idk if this makes any sense this is just my take on it.