The same product categories definitely do exist (I know I changed your wording there a bit). In fact, many of the software companies that advertised back then s

The same product categories definitely do exist (I know I changed your wording there a bit). In fact, many of the software companies that advertised back then still exist today in those same categories. The main difference is that today they advertise in ways that are out of reach for most ad budgets. It's the "reachability" that is so difficult, not deciding which category one wants to target.