I said something similar about Avengers Endgame. A single-digit year gap is exactly the worst duration for someone to be away. If it's weeks or months, no problem, most aspects you really can step right back into your old life. If it's a decade or more, there's just no question about it: not happening. But a couple of years? You probably won't, but there's just enough of a possibility that that hope winds up wrecking you.