I'm cautiously optimistic that Stalwart is a game-changer. I would normally stick with a simpler platform (like mox) if I wasn't interested in the groupware space. I've previously tried Nextcloud and SoGo and left disappointed, and have more or less been waiting for a project like this to come along.
Nextcloud was such a terrible experience for me (the file sharing/storage was good, but the groupware aspect was incredibly buggy). But knowing that Nextcloud is partnering with Stalwart to hopefully overhaul their stack, Opencloud is developing their JMAP integration, and Mozilla/Thunderbird is using it too (they already have a webmail in development here: https://github.com/thunderbird/stormbox)... we might finally see some exciting development in this space. And now is also a ripe time, as there seems to be a perfect storm of people wanting to get away from Big Tech platforms.
Nextcloud was such a terrible experience for me (the file sharing/storage was good, but the groupware aspect was incredibly buggy). But knowing that Nextcloud is partnering with Stalwart to hopefully overhaul their stack, Opencloud is developing their JMAP integration, and Mozilla/Thunderbird is using it too (they already have a webmail in development here: https://github.com/thunderbird/stormbox)... we might finally see some exciting development in this space. And now is also a ripe time, as there seems to be a perfect storm of people wanting to get away from Big Tech platforms.