which does something surprising to me: it launches proj1 twice, and both RStudio instances seem to share the same R session, with their consoles synced.
My questions are:
any idea what is happening?
how can I achieve my goal (launch multiple projects at once)?
The simplest solution would be to sleep or wait after launching each RStudio session -- it seems like there's a race condition where multiple versions of RStudio launches at the same time can bind to the same session.