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Nothing as epic as yours, we were traveling for a 1.5y in a mix of modes, but only 3 months on bikes and in Europe. We spent 6 months in South America, mostly in Patagonia as a mix of through hiking and road tripping with a van, then skipped north to the Atacama, Bolivia and then Peru. Met a lot of people on the road and gather intel for future trips.
After one “once in a lifetime” trip you realise how many more you want to do - and also how it’s possible to do them.
I do agree with this and I have a few plans in mind don't get me wrong :)
Comeback has been very gradual for us and more like ups and downs than shocks, but overall took us about a year to stop thinking about the trip constantly. 6y later, I think the simplicity of living off few things, limited to what you have in your bags while travelling is still very much ingrained in our lifestyle almost as if we were ready to leave again at any point and didn't want to have to get rid of too much.
The thing that changed the most for us was our expectation of future trips, but then we had our daughter and all went out of the window anyway.