a) no to cargo exec b) If you have a better solution for bundler, please open an issue and suggest it. c) There are few simple solutions to avoid `bundle exec`,

a) no to cargo exec b) If you have a better solution for bundler, please open an issue and suggest it. c) There are few simple solutions to avoid `bundle exec`, which is mostly there to make things easier when getting started. I'm sure you spent a few moments to get to know your tools, so you must already be aware of these.