To me market saturation just means - a lot of people is solving a problem in the same manner.
But as the saying goes, "there's always room for improvement or innovation".
It can all come down to perspective, and how you look at things.
For example, I've suggested to many marketers having trouble finding a niche to stop trying to find one ... and start looking for ways to improve already existing niches.
More money is being made from improving existing niche products and services -than from finding new or undiscovered ones.
That should be good news to those I hear complaining of not being able to find profitable niches. They already exist! Just find ways to improve them!
Let others be the pioneers ... and take the major arrows and hits.
For one example it can be as simple as looking for -
Irritations, Challenges, or Inconveniences people in a niche market you're passionate about face. Have you asked them? Most of your competitors probably haven't lately ... or at all. Are you taking advantage of this?
Next, see if you can do something (product or service-wise) to solve one or all three of the above problems.
Then test any improvements you come up with in the marketplace.
This is one of the many actions you can take (minimum) before feeling intimidated or stuck because a market has a lot of competition.
So, don't be too quick to assume a market is saturated (or you can't make any money). As long as someone is making money you can too - with the right strategic improvement(s).
I invite your comments, questions or even disagreements.