Ask HN: B2B software, state of the art?

2 points by NoWizards ↗ HN
I am trying to develop an app for my clients to use (small business) but inmediately got surrounded by terms like: microservices, SaaS PaaS, IaaS, etc... Now i dont know where to start, or what is the state of the art. Tried searching a course i remember from edx (SaaS on ruby on rails) but its archived. got the feel that this business model is a bit outdated or something new is trending. Is there any place to start?

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State of the art {what}? SaaS PaaS, IaaS, etc are delivery models so it depends highly on what your app does, how will small businesses consume it? What are you building?