[benologist]

They're filling two jobs if you move - your old job and you in your new job. It's more disruptive than just bringing one new person in to fill one new job.

Their capacity issues etc are not your problem. Your problem is how to get from where you are to where you want to be, if you're happy with more responsibility instead of a different role then stay.

[fooboy]

To be fair my direct manager is supporting me on this--he's giving me more quantitative work and the work time to knock it out. If I stay it'll be because of that.