im finally heading to japan next month and i really dont want to be that person constantly swapping lenses while my wife waits for me to catch up. ive been doing some digging and the tamron 28-75mm g2 seems like the favorite for the f2.8 speed but then i see everyone saying the sony 24-105mm f4 is the actual king for travel because of the extra reach.

my budget is strictly under 900 bucks so im probably looking at the used market. im just worried the f4 might be too slow for those dim kyoto alleyways but 75mm feels a bit short for street stuff sometimes. honestly what is the one lens you just never take off your e-mount body?