Is the keyboard in the band important?
The three major electro-acoustic bands, guitar, bass and drums, are indispensable, but the keyboard can be used as a band (of course, the effect is much worse), depending on what style and song you want to play. Generally speaking, the music effect of a band with a keyboard pad is not too dry, so the band can do without a keyboard, but the keyboard is very important, and talking is better than nothing.