I came back from annual leave yesterday, opened my emails and found I'd had a scientific paper accepted for publication.
I and colleagues started the work on it in 2013. I moved to a new job 2016, although carried on doing some bit-part experimental work to tidy it up until 2017, and then it got stuck in development hell. It ended up needing three other researchers to finish, as we original ones couldn't spare enough time. So, nine years from start to publication. But it is done, and it made it to a good (if not spectacular) journal too.