as much as i dont like using other software as example making a mockup would take too long:

yes i understand that loud and clear, BUT i've been using it as a replacement of the other one, the whole point if to be able to modify one curve at a time, which it does.
as i said, its almos there, its not the same, but the way it works its the same just graying out the other curves instead of not showing them.
the functionality is there.

@Luciano Muñoz Sessarego (looch) That option only shows the *keyframes* rather than the F-curves entirely.

In T73932#874366, @Aaron Carlisle (Blendify) wrote:

Seems to be related to Image sequences, single images work fine.

well yes deleting is deleting,
unselecting is a whole other thing, you deselect a channel and it should dissapear from the stack.
That's how i'd approach it, i just dont have the tools right now to make a mockup, but should be select channels, go stacked mode, those channels appear, unselect one of them it dissapears from the stack, the stack rearranges itself to fit the graph editor space, you select an other channel (add) and it will again refresh to accomodate the channels into the stacked view.

I didnt get how it suppose to be to add some channels while in stacked mode. To remove some channels right from stack was a good thought but seems that someone said that it would be excessive.
Oh, it was dr. Sybren - "That's a hard NO for me. Deleting should be deleting. Hiding from some list is not deleting. "
it was answer for my - "Well.. I meant when you press Delete hotkey you just remove selected channel from the stack but not delete it as in the non-stacked view mode. (also there could be some confirm menu after you press delete hotkey - remove channels from stack)"
But maybe I did get him wrong

the moment you click shift click a new channel (add), it will add it at the bottom of the stack, or inbetween depending on the order of the channels on the left side

In T71238#874351, @Luciano Muñoz Sessarego (looch) wrote:

couldnt one just select more or less while in stacked view and it refreshing itself according to that selection?

I will manage this task in the refactor. In that change, the eraser never will create frames, only draw will create frames. The change will applied when the refactor patch will be merged in master.

Seems to be related to Image sequences, single images work fine.

I can confirm

couldnt one just select more or less while in stacked view and it refreshing itself according to that selection?

Regarding this issue, I think blender in its entire user interface, has a consistency issue in regards to SELECTED and ACTIVE.
In some places, are arbitrary colors, in some are orange and bright orange, in some other areas are white and orange.
I propose we clean it up and make it always in every single place orange for selected, white for selected/active. ( i would love to be able to get rid of unselected/active, because its very confusing but that's an other topic)

I'm not sure that i would give quats entirely different color scheeme i would do RGB for XYZ and add a color for W, because it makes it really hard to figure out the axis if you already set that color coding through the blender interface and even more through every sort of convention ever.
but yeah I dont know the reasoning behind wanting to make it different.

Regarding this task

Add an option, on by default, to only show the selected channel curves. Most of the time this is more practical than toggling the eye for every channel.

Yeah, T73252.zip suvives like I said. Can have a look again tomorrow if I can come up with something

Either @pistol ioan (pistoltoto) or @Philipp Oeser (lichtwerk), please provide some steps to reproduce this issue. I can open the files from T73252.zip just fine without any crash. The originally uploaded file is too complex for a developer to analyze.