Curse of Years

Hello everyone!

I’m finalizing my upcoming Europe adventure and made a quick checklist.
Could you scan it and tell me what I might be forgetting?

✅ Flights booked
✅ Interrail pass ready
✅ Basic travel insurance
✅ Budget hotel reservations for Rome & Paris
✅ Europe Trip Planner tool -> tourspilot.com (lets you drag-&-drop cities + auto calculates train times)
❓ SIM card vs eSIM?

Appreciate any tips!
—Linh