There is no single viability model here, it entirely depends on what kind of software are you building, selling and who are your customers. SaaS vs on-prem has

There is no single viability model here, it entirely depends on what kind of software are you building, selling and who are your customers. SaaS vs on-prem has its pros and cons, you should always listen to your customer and carefully analyze which model fits best. Many models offer both SaaS and on-prem as well.