Travel photography – but with only one lens choice

Err… No. If you prefer wide normal to normal that is. If not, yes. Barking.

I wouldn’t loose a 35mm for a 23mm
You can use a 35 for all round photography, as a struggle you can take a portrait, you can use it for landscape and street photography.
A 23 has only one use. Wide angle landscape.
You’d be bonkers.

Remember it’s APSC so 23mm is 35mm and 35mm is 50mm

35 and 50 (equiv) are both appropriate as an all round lenses. It’s a preference.

A 23 has only one use. Wide angle landscape.

Or push conventional thinking.