"Losing 30 trillion" is a very entitled view on decreasing real estate prices. Those 600 million people making 1000 CNY/month or less (and probaly another 300 million making a bit more) will be happy for a respite in being priced out of everywhere. This literally increases their purchasing power.
For me, cargo is among the most reliable package managers these days. It is about as convenient as any other Linux package manager (and therefore much better than the feeble Windows or Mac alternatives), yet also compiles from source. I evidently don't fall into the 99.99% of Windows users without a C compiler, but I also never write Rust. Anyway, the point that I am making is that it is entirely possible to have a distribution chain that involves a compiler and a user that does not know how to operate that compiler. And how is that fundamentally different from JIT compilation in a JVM or JS runtime anyway?
It's not "limited space". In Germany, as in many parts of the US, strict zoning disallows building housing where people have to work/want to live at the cost of workers to the benefit of rent-seekers.
An average pre-WW2 house in a German village may be prettier than an average house from the 1950s, but certainly not than an average house being built today. Your perception is presumably clouded by the touristy "villages", which in fact have been at least locally important towns at some point in the past.
Most senior, non-applied mathematicians in academia (including those with fancy titles at prestigious universities) outright refuse to adapt even simplest technological advances, like version control, let alone think about possible large scale transformation of mathematics. I wouldn't take take anything that they say about technology too seriously.