It sounds more like "I don't want to maintain a feature of that scope" or "I don't want to commit to the design decisions this feature would require". Both of t

It sounds more like "I don't want to maintain a feature of that scope" or "I don't want to commit to the design decisions this feature would require". Both of those aren't solved by a PR. If you're discussing with potential collaborators and want to communicate that you don't have time to develop such and such a feature but would be open to accepting a PR, it's very natural to say "I don't have time to develop this feature but would be open to accepting a PR".