Today most of the things are commoditised. If you look at the tech scenario 10 years ago you needed a minmum of ten people to something impactful and release it. Fast forward to 2021 there are many one man startups which have created considerable impact.

So as long as you know how to stitch together today you can solve most of the problem irrespective of their scale. I am limiting this to tech. But considering that Capital is cheap and VC are ready to fund risky startups you should be able to solve any problem of any scale if you are really interested in the domain and have the