The fact is that today there are a lot of new ideas and projects that professional developers want to implement. I do not take into account fraudulent projects. But not many of these ideas will be able to use IEO, because we know about the harsh conditions of this procedure. Anyway, most of the new project will pass through the market of ico companies.
Because the IEO is more in demand by investors and traders because the potential for fraud is so small that many projects no longer hold ICOs to collect their funds, because the IEO trend is already very advanced rather than ICO.