[stevenameyer]

Whether or not a startup succeeds is not about probability, it is about producing a good product that people want. If you have the time/talent/resources to produce 20 different solid products that people are likely to be interested in using then go ahead. However I think this is very unlikely.

More often then not building a product that is capable of success requires a lot of commitment emotionally, mentally, and financially. Realistically being able to provide this level of commitment across several companies is not possible for the vast majority of people, and not giving each company enough attention will spread you too thin and will likely end in all of them failing.

Ultimately if you can create multiple products capable of success at then same time then for sure, go for it. But most people can't do that, and in the long run one company that produces a really good product people want is a lot more likely to succeed then 20 that have ok products that people may or may not even want.