When running `wrk` to do performance testing and monitoring in Observatory [1] and with anything we have in production, I haven't seen an Isolate or the process ever die. This may be a question better suited for the Dart VM team, I'll see if I can't ping someone.

And yeah, as a native iOS developer for many years, I finally sat down and built something in Flutter this weekend and really liked it.

1: https://dart-lang.github.io/observatory/