Just posted my reply on the thread, to summarise:

1) Default sharing of code (only manual turn off)

2) Was an incident where I believe at least some versions would share your env files (without manual .cursorignore)

3) Agent mode is quiet bad for novel code

4) Agent mode either overshoots(overcomplicates code), mistakes context or refactors too much

The only benefit I get is:

a) Chatting in same window as my code

b) Ctrl+L shortcut

(edited for formatting)