It's hard to say until we have a working emulator. You don't need CPU instructions translation, so it should not be 20X as the case with NES, however even with the same CPU architecture it takes 1.0 GHz host CPU to emulate 66 MHz machine, so it's actually 15x multiplier.
The problem is that IPv4 address space is not truly exhausted yet. Every hosting provider sells servers with IPv4 address by default, and maybe provides a small discount for IPv6-only servers.
Similarly, many internet providers still offer IPv4-only service plan, and many of those provide a separate IPv4 address for each customer.
As for languages that are acceptable for business logic, C++ is lolno, Java is kinda surprisingly okay because so much business logic is already written in it and debugging is trivial, Python is not worse than Java for the same reason when you are using proper linter to catch typos, C# / Go / Ruby are probably the best because they are most modern with the lowest footgun ratio.
JSON-in-a-string is a commonplace method of having a generic or any type when you are too lazy to write a proper structure for it, or want to save an object into a database without creating an additional table. In all fairness it has nothing to do with the language itself, and more with lazy coders. Postgresql even have additional SQL operators to access individual JSON fields inside a record, so yeah, you can dump a whole new unstructured database into a row of your existing database, it's totally an acceped practice.
It's Javascript with types. You are still using one hundred NPM packages to do the simplest thing. Any string can be JSON. And Node is single-threaded, so if you plan to create some kind of parallel computation, you'd need to run 16 Docker containers of your Node server, one per CPU core, with NGINX or some other load balancer at the business end, and hope that your database engine won't reorder transactions. And yeah, Docker is mandatory, because Node version in your latest Ubuntu release is already outdated.
Eh, Chinese manufacturers are also desperately trying to catch up with AI hype. In any case, we'll see some new brands on the market, and it's not a bad thing, and I would not spend my time worrying about giant rich corporations.My actual worry is that once RAM prices go up, they won't go down for quite some time. If we get another bubble after AI bubble pops, the prices may not decrease at all.
Because there still are 12-button numerical keyboard phones with T9 text input.