From my point of view the root cause is that Fusion 360 is not stabile, each update brings new problems and the get long time to get fixed.
But it probably is also that I use the Fusion 360 wrong. The Sketches are for me mostly single use, unless it is something right now working on, but next day I rarely search for the old sketches, but just great a new one. So I end up easily 100 sketches and really would like to delete the old unused ones. The only way I have found safely to do this is to store as STEP and then back.
The problems with the links between the inserted models is something new. It started some time at this spring. It is something to do with capturing the positions. the work around I found was to go to the inserted model and do a scetsh so that it captures the positions and save it, after the parts stayed on the places they should, but that does not work any more, and it also breaks the model where it is inserted to the updating or removing. it. This could be as some parts might have been created with sketches that where drawn on the inserted model, but I do not remember this being problem before.
Very rarely I modified a just created sketch and that can be useful, the the model is updated according to the changes, but other than that I newer use the history related functions other than undo. They are just pain int the... causing so many problems.
What practical use could the history functional have, how could it be manageable to go to delete some step in middle of history??
The above proposed solution is not working, it just moves the history from bottom of the screen to the side bar, and over time causes terrible amount of scrolling as that can not even be collapsed. So that is even less managable than having it at the bottom and not using it.
But thanks, that was actually one of the problems I had with the STEP files, the history is by default disable on a model that was imported as a STEP, causing the problem of uncuttable history on the side bar.
I really hope there would be a button that deletes all the history, without going trough storing as STEP and importing back. I also really hope there would be a way to completely disable the history functionality just keeping undo, with out the side effect the history on the side bar, or what ever that is.