Tom, this is amazing. I'm 22 right now so I feel like it applies to me pretty damn heavily.
When I was 18, I left the UK and moved to Australia for a year. Afterwards, went traveling around North America, Asia, and europe. Couple dozen countries.
I met so many amazing people. I learned how to solve problems and deal with stressful situations. There were so many beautiful benefits.
But like you said, I feel like it's the best thing I've ever done. Heck, I'm abroad right now in Canada. Moved to vancouver a week ago. Plan on getting back out there as soon as things reopen a little more.
Travel taught me so much. And of course, still got a lot to learn. Anyway, I'm gonna stop ranting and just say to have an awesome day