Product lines 1 - 10. Bigger is better.
A minimal number of qualifiers next to the numbers, ideally just 1 of them next to a product line number (Pro/Home/Hobby/Enterprise/whatever).
Date, month and year format if you really want flexibility.
OblioCorp Oblio 1 Home 2020.06. Oblio 10 Enterprise 2021.04.
How hard is that? Not that hard, from where I'm standing.