I agree with you re:extensions. I know something of the extension ecosystem for it - I built one - https://github.com/Hellisotherpeople/llm_steer-oobabooga

Oobabooga the closest thing we have to maximalism. It has exposure for by far the largest number of parameters/settings/backends compared to all others.

My main point is that the world yearns for a proper "Photoshop for text" - and no one has even tried to make this (closest is oobabooga). All VC backed competitors are not even close to the mark on what they should be doing here.