Your question of reaching impracticality is actually backwards imo; it's impractical if you have a 30y gap, that's what this aims to fix. This is a good rule of thumb from a former PGA Teacher of the Year that helps you to actually be able to start somewhere with filling your gaps instead of the utterly useless "just use clubs that carry how far you want." No kidding. This is how you can go about trying to achieve that. Not guaranteed, but works for most, and certainly a practical starting point.
Many hybrids are labeled with numbers instead of or in addition to lofts; a few that come to mind are Epic Flash, Rogue, Apex, Big Bertha, G410, G400, G, M6, M4... well you get the point.