The new runtime does change things: with `--newruntime -d:useMalloc` C's malloc implementation is used and that can work differently/better with DLLs. The new runtime doesn't use conservative stack tracing so that's also one thing less to worry about.
Having said that: **0.20 actually ships with "hot code reloading" (HCR)**, I'm reworking its documentation. HCR does work with the existing GCs, you don't have to wait until the new runtime is ready, enjoy!
