why do we have `butlast` instead of `!last`?

[RA]

Today I needed a filter to return everything but the last title, and first thing I thought of was to use `!last[]`, but... there is only `butlast[]`. Am I not seeing something, or is this illogically inconsistent?

[clutterstack]

I haven't paid a lot of attention to which operators can be negated and why, but if it seems more elegant, you can use first[-1] instead of butlast[]...

It seems clear there are some operators retained only for backward compatibility. butlast also has synonyms bf and rest.

Best,

Chris