From personal experience, and as someone who has been in the same company for 8 years, and have turned down multiple offers, even for a compensation that's been

From personal experience, and as someone who has been in the same company for 8 years, and have turned down multiple offers, even for a compensation that's been magnitudes higher, I can list only one thing: The team(or at large fraction of the team). That's the only reason why I'm still around. Put a shopping cart wheel on a tank and it will break, simple as that. At this point, we can easily deliver large upgrades faster and more efficiently than anyone else. If I were to leave at some point, it will likely be with the entire team coming along. So yes, be clear about what the exact responsibilities everyone has and build up a solid team where everyone fits in.