Before I could use

/kill @e[rm=0]

to kill everything except me and entities at same position as me. When I run

/kill @e[distance=0..]

it counts 0 distance as well. I tried

/kill @e[distance=!0]

but argument here is invalid.
There should be multiple selectors for distance with working distance=!X to give ability of working as before. With distance=!X..Y we can replace:

 @e[rm=1,r=3]

with:

 @e[distance=..3, distance=!..1] or @e[distance=1..3,distance=!1]