Ask HN: When is it time to give up on a side project SaaS?

I started a SaaS business official in May 2019. (Although I spent about 8 months developing the application). I didn't officially acquire my first customer until May 2019. Fast forward to May 2020, and I've got about 8 paying customers. I'm really proud and impressed by this accomplishment. Growth is, however, slow. I have a good understanding of who my target customer is now, 1 year later, after talking to them and noticing common patterns in terms of their needs. This is my first real business. I would really love to hear from someone experienced in building a SaaS business from scratch. Your insight would be appreciated. What should I expect in terms of growth? How fast did businesses grow in the beginning (BaseCamp, for example, Digital Ocean, MailChimp)? Thanks