There's a curious ephemerality to MOOs. You can create rooms and objects in the shared programmable universe, but if you don't log on for a while, it's all deleted.
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I see that *up has become an increasingly common name for toolchain installers: rustup, ghcup, even juliaup.
I think Rust was the first to use this terminology? I'm curious how similar the different *up tools are.
It's so strange that we talk about languages being slow, and have done for years. Computer performance has increased so much in this time.
https://hbfs.wordpress.com/2009/11/10/is-python-slow/ (shared on HN in 2009) discusses Python being slow. My underpowered Thinkpad has 20x the single-threaded performance! https://www.cpubenchmark.net/compare/73vs3766/AMD-Athlon-64-4000+-vs-AMD-Ryzen-5-PRO-4650U
Maybe *relative* performance of languages matters more?
It took me way too long to realise that Arc<Mutex<T>> is basically a way to create multiple &mut T references (with runtime constraints).
This means that you can use plain &T and &mut T in the vast majority of your code. Most code doesn't need to care there's a mutex.