Depending on how small the niche is you can sacrifice a small amount of users if they switch to keep the code simpler. Also it's not like the model prevents you

Depending on how small the niche is you can sacrifice a small amount of users if they switch to keep the code simpler. Also it's not like the model prevents you from adding features. But it gives you more freedom to pick the ones that make the most sense to implement because you do not need to constantly chase new users.