No screenshots like that please:
The plan is to support adding masks and modifiers from the layer stack UI. Such a system would not be limited to a handful of nodes, it should also be possible to add user created node groups from there. Likely there would be some kind of asset tagging to indicate which node groups are suitable as masks or modifiers, to avoid seeing a long list of irrelevant node groups.
There’s no specific design for stacking masks or modifiers on masks, it’s something we thought about but it would be interesting to see ideas for what the corresponding texture nodes would look like.