Most developers know how annoying it is if something is written in one programing-language, but it is needed in another one. This also occurs here. Sometimes you wrote something in Wikipedia and you would like to report it to phabricator. Or something is written in phabricator and this should be reported upstream in gitlab/github/gerrit.
It would be a nice feature to have a basic converter (not necesarrily supporting all features, because bugreports need any-way need to be adapted to the individual project), that can convert most common features such as hyperlinks and tables.
It might be declined as out-of-scope, however I ask if someone knows such one or would like to create one. (even if buggy, better than nothing)