Can you Please stop constantly with the British routes Please German routes and also Austrian routes and swiss routes.
Guess what. Almost all the 3rd parties have experience working on uk routes, so obviously they will make uk routes. Dtg themselves don't actually make that much uk routes. They create about an equal mix of uk, german and us routes along with the new countries here and there. Not every single developer make every single country. They focus on a specific region if that is where there expertise is More countries can't come unless more 3rd parties get added
DTG, and most, but not all 3rd Party Devs are based in the UK. For example, Skyhook and Rivet are based in Liverpool and Stirling (I believe) respectively. So of course they will mainly do UK routes / packs.
There would be uproar if there were no new UK routes even for a year. It's DTGs home market, it's clearly making money for them, why should they stop? The TSC network covers much of the UK now, I expect that'll be the case with TSW in 10 years. I appreciate it must be frustrating for people living in countries that have no coverage in TSW but there are probably good commercial and/or logistical reasons. Obviously most of us would be delighted if, for example, a Swedish developer entered the game, but that's what's needed for coverage in more countries, local developers. If you can see a gap in the market, why not start developing routes?
