The routes include Moscow and Dublin. What city on Earth has train routes that can reach both of those cities? Another point in favor of Lego City not being on the Earth we know.

Instead of scaling the Legos up, assume that they're life size beings on a Lego sized pseudo-Earth. It's been years since I've done any physics so, I hope I'm not badly off, but I think the gravity will be around 1/900th that of Earth (if we assume radius of Lego world at 1/30 earth, mass of Lego world proportional to the cube). If we ignore the fact that there probably won't be an atmosphere on Lego world, I'm sure there are are various other applications of the square-cube law, etc. that will work in their favor as well.

I believe they'll make it.

It'll actually still be 1/30th of the Earth, since from Newton's law of universal gravitation:

F = G * (m_1 * m_2) / r^2

m_2 * a = G * (m_1 * m_2) / r^2

a = G * m_1 / r^2

If we make m_1 1/30th of its original size and to the same to r:

a = G * (m_1 / 30^3) / (r / 30)^2

a = G * (m_1) / r / 30

As escape velocity v_e is where GPE + KE = 0:

v_e = sqrt(2 * g * r) from the surface of the planet

If g is now 1/30th of it's original amount as shown above, the escape velocity would be sqrt(30) = 5.477 times less, or about 2042 m/s. So yup, they would make it if it's at 1/30th the size of the Earth, with thrust to spare for air resistance.

I'm sure there's a city with train services connecting Dublin, CA (served by the BART) to Moscow, ID. The question might just be when...

There is an underwater-tunnel between france and england with trains running. And there is the irish sea bridge-project with the goal to connect great britain and ireland by train and cars. Making such a route possible in some yet unbuild future reality.

$243... I finally understand why my parents never bought me these kits lol

The train sets have some really dedicated collectors. This is an old set I think so probably not representative of a regular LEGO set. But yeah they’re not cheap.

This is an old (no longer officially sold) set and Amazon is know to have completely over the top prices for them.

The original price is hard to find but seen to have been between 80€ and 130€ (probably the later).

Current prices for "new/sealed" (quality) sets seem to be around 135€.

Before corona it was around 100€:

https://www.bricklink.com/v2/catalog/catalogitem.page?S=6005...

Sadly LEGO doesn't produce many good train sets in recent years. They had quite a variety of not cheaper but also not very expensive sets when I was young.

Still I won't disagree that Lego had many overpriced not so good sets.