77 borders to go, but then what?

I have just been totalling up the statistics from this autumn's #CrossBorderRail journeys, and the total number of border railway lines I have visited now stands at 449, and there are 77 more to go - this map shows the remaining ones:Map showing the 77 border crossings I am yet to visit - only 2 of them (1 narrow gauge) notionally activeAs well as the record breaking trip this autumn, I also covered all the lines I was missing Spain - Portugal, Lituania - Latvia, Latvia - Estonia, and Slovakia - Ukraine. The full map of where I have and have not been is here.Importantly there is just 1 single properly active railway line I am missing - Rybnitsa 🇲🇩 - Klymentove 🇺🇦 in the north of Transnistria, Moldova. Vardište 🇧🇦 - Mokra Gora 🇷🇸 (a 760mm gauge tourist line) and Widnau 🇨🇭 - Wiesenrain 🇦🇹 (750mm Dienstbahn der Internationalen Rheinregulierung) interest me rather less. And beyond that all the other 74 are either dismantled lines, or planned future lines and, in the case of most of the…