Out of curiosity, what product does your company make? What kind of moat do they have if anything you do can be replicated in under a year by a competitor?
If a roadmap goes out 3-5 years and a candidate only executes on one or two of those years, the candidate hasn't gained experience with which parts of a roadmap stay committed and which ones change in response to new information/priorities.
Most of this does not apply to a hot startup where the founders are still coding every day, but those aren't the only senior engineering opportunities.
My meta-experience is that the kinds of things I'm talking about tend to be most highly prized by companies that have been around longer than a startup, and now have problems to solve technically and organizationally that can most effectively be solved by people who have stayed in one company longer than one-two years.
Such companies aren't usually as exciting as pre-IPO startups, so absolutely no side-eye from me if anyone reading this is thinking "You can take that job and shove it, I'm busy inventing the future on a two-pizza team in a six-pizza startup."
I'm not sure what company you're at but there is certainly not a multi-year project in any I've worked at. There are long term _product_ roadmaps but in order to stay agile you never commit to something as big as a multi-year project. There are only individual features that get committed to. Even in core infra (heavily technical) where needs and solutions are known committed work goes out a year tops.
Absolutely you want people who delivered things from start to finish but I've never heard of those things taking multiple years. If it takes 2-3 years for your product to go to market it's a failure, regardless of whether it's an external or internal product.