It's probably also worth noting that with advances in manufacturing, new - relatively cheap - lenses can be quite good, even compared with older "high end" lens

It's probably also worth noting that with advances in manufacturing, new - relatively cheap - lenses can be quite good, even compared with older "high end" lenses. New Sony lenses are for example quite good. The situation is different if Obe has (access) to an existing collection of great lenses, obviously.