It depends on what the mailinglist is used for. PRs? a source forge (gitlab, forgejo, radicle, …). Discussions? A forum (lemmy, nodebb, discourse, even phpbb). Announcements? Microblogging platform (mastodon, misskey, …).
Everyone and their mother has a browser, developers have very few problems contributing to projects on source forges, interacting with issues, PRs/MRs, giving and receiving feedback, following discussions, and require little to no setup. Mailinglists require configuring the email client, getting to know the desired format of emails for each new mailinglist (top response vs bottom response, inline responses to comments vs quoting each thing they want to respond to, probably no HTML nor markdown, how media like screenshots or logs are shared, etc.), learning how to follow discussions and navigate mailinglists, etc. In short, mailinglists are a terrible mess, horrible to read and interact with, and plain unattractive (UX and UI) for newcomers.
what would you choose to replace mailing lists with? e-mail is accessible, easy to archive, and archives are also accessible and easily searched
genuinely curious
It depends on what the mailinglist is used for. PRs? a source forge (gitlab, forgejo, radicle, …). Discussions? A forum (lemmy, nodebb, discourse, even phpbb). Announcements? Microblogging platform (mastodon, misskey, …).
Everyone and their mother has a browser, developers have very few problems contributing to projects on source forges, interacting with issues, PRs/MRs, giving and receiving feedback, following discussions, and require little to no setup. Mailinglists require configuring the email client, getting to know the desired format of emails for each new mailinglist (top response vs bottom response, inline responses to comments vs quoting each thing they want to respond to, probably no HTML nor markdown, how media like screenshots or logs are shared, etc.), learning how to follow discussions and navigate mailinglists, etc. In short, mailinglists are a terrible mess, horrible to read and interact with, and plain unattractive (UX and UI) for newcomers.
Anti Commercial-AI license
fediverse groups, of course that would require structuring the software in a way that resembles mailing lists instead of reddit