This is an interesting take. I prefer the opposite approach: choose the shortest possible registration window (1 year), and have a very clearly defined, properly-documented renewal process that multiple people at the company understand. It's unlikely that all of those people leave the company in a 1-year window, so the knowledge gets passed on reliably.
If a renewal happens only once every 10 years, then it seems very likely that the person responsible for it has moved on, knowledge around the process is lost, and at best the documentation is very out-of-date (but more likely it's missing).
My process is to have a shared calendar for these high-risk renewals. Top company officers should be on this calendar (CEO, CTO, and some engineering VPs). The calendar contains recurring events for domain and SSL cert renewals. These calendar events are set up for about 1-month before the actual renewal, and fire reminder emails at several intervals beforehand (in case people are away or on PTO).