At the moment 1-9 hotkeys (in 2.8) are used to switch editor modes (Object Mode / Edit Mode etc).
I think the more frequently used operation is switching between selection modes.
It would be much more convenient to assign hotkeys 1-9 to the operation of changing the selection mode:
Mesh Edit: 1 - Vertex, 2 - Edge, 3 - Face, 4 - Select Linked, 5 - Select Material
UV Edit: 1 - Vertex, 2 - Edge, 3 - Face, 4 - Island
Particle Edit: 1 - Path, 2 - Point, 3 - Tip
