I think that companies like IBM, Oracle and Adobe have enough money to license whatever editor they want to use in their products, and the fact is that they are using CKEditor: ckeditor.com/who-is-using-ckeditor So maybe it would better to spend that money supporting CKEditor with a license and helping that way to improve the tool that you are already used to.
You wrote: ...to consider non-open sourced products... and ...likely need to make some modifications... These two statements are in contradiction. I'd consider it unlikley that you'd be allowed to make modifications to a closed source product. Additionally, the bulk of code in virtually all web-based WYSIWYG HTML editors is Javascript, so is effectively open source by default, since the software is served as source code to every web browser that views the page.
Because of this, any closed source product that doesn't want to be pirated is almost certain to have its Javascript code heavily encrypted and/or obfuscated, which will definitely be problematic for you if you need to make modifications to it. There is however, a third option which may work for you: There are some which offer a commercial licence as well as an open source licence. An example of this is the SPAW Editor, and it is in fact quite a good product.
The commercial licence allows you to modify the source without having to redistribute your code, which is a big plus point for some companies. Sadly it seems to have stalled in development a couple of years ago, so it isn't going to be as good as some of the more up-to-date alternatives, but it may still be worth investigating if that licensing option sounds like the kind of thing you need. You can even download it under their open source licence to see if it's any good, and buy the commercial licence afterward if you like it.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.