Most travellers pack twice what they need. Going carry-on only for trips under 2 weeks is realistic, easier on travel days, removes airline luggage fees, and produces a calmer trip generally.
What carry-on actually accommodates for 2 weeks
5-6 tops, 3 bottoms, 2 dresses, 1-2 layers, underwear/socks for 7-10 days, sleepwear, swimwear, 2-3 pairs shoes (one on feet, two in bag). Toiletries in 100ml or solid form. Plus phone, charger, book, basics.
What gets cut
Multiple shoe options. Outfit variations 'just in case'. Heavy book versions (Kindle replaces). Toiletry duplication (buy at destination). Hair styling tools (often rentable). Hairdryer (most accommodation provides).
Try carry-on only for next trip under 2 weeks. Most people who try once never go back. Lighter travel produces calmer travel.