Ask HN: Is anybody running a successful non-subscription business?

Is there anybody here who is successfully running a business that is not based on a subscription revenue model?

I have a nice side project (a macOS app) that uses a one-time fee. But very often (while listening to some podcasts about bootstrapped products) it feels like it's either subscription-based or nothing. Is there no point in having a one-time fee product? Is that correct? Am I living in a SaaS bubble?