Travel is a bit like weddings - some want the full monty treatment for total coverage recall decades later, others are happy with a handful of fine art images. Travel invites the full range from a few snapshots of the key sights and selfies (can't forget them) for the world weary, to something more significant but with limited time/will to carry and care for gear (backup, charging, etc); out to semi-pro or advanced documentary work - the real full monty, which is very different indeed to 'travel lite' or travel medium', in terms of logistics and itinerary planning.
I advise looking with a steely eye at your travel plans and circumstances, then match them with your gear needs - needs, not desires. The more important it is to you, the more time to allocate to it and plan for it in your itinerary, and the better the equipment should be.
Better is not bigger here, otherwise you would not be reading a Sony forum would you? ;-) Better is a better match. Make every piece earn its place, be ruthless. Gear forums are full of people who just love the equipment, often for its own sake - hence camera porn. Be prepared to walk away from the one percent shots you need that exotic lens for, for example. Consider what you want to see as your 'trip portfolio' when you return home. The more you know the more prepared you are.
Consider the wastes of precious shoot time devoted to lens changes, adapters, filters, and all the fussy stuff like stitching, tripods, etc. It's all going to destroy spontaneity, exact an opportunity cost, including the next great image you cannot find the time or energy, or the approval of impatient significant others, to take.
Final word goes to Steve McCurry:
"I don't want to get too technical. I hate all of that. In the end it just depends on what your picture looks like. You print it out and put it on the table and that's proof right there. Everything else goes away."