I agree on the point that useful software/service providers must have a sustainable business model, but I see your point about $80 being too cheap as just one d

I agree on the point that useful software/service providers must have a sustainable business model, but I see your point about $80 being too cheap as just one data point (not that you were claiming otherwise, and you did appreciate the value that you get). There are many people for whom spending $80 every few years may be a bigger burden too. Subscriptions, without significantly lower per year prices, also favor the ones for whom these aspects don't matter as much. I just wanted to put these points across since a single price probably may not well serve all user classes and the developer/company.