if you really need a lot of funds then you need to do ICO/IEO but if you can get your own investors to fund the project that you are developing now then there is no need to do ICO/IEO
Yes, but for now if the project developer wants more funds for the project, the choice is through IEO on a good exchange bro, not through ICO because investors now no longer trust ICO since there are many scammers in ICO in the last two years.
I don't think there are many examples of relatively small projects without ICO/IEO in general, even if they have investors.
It can happen tho with big projects, they can delay for several months