I used Thunderbird daily for the better part of a decade until about 3 months ago. It&#x27;s nothing personal against the project, which is currently the best serious desktop mail client available afaik. It&#x27;s simply that Mozilla doesn&#x27;t care about it anymore since everyone uses webmail now. Thunderbird is doing feature releases about once a year now [0], and Mozilla has pulled most (all?) of its full-time developers [1]. A few months ago, Mitchell Baker sent a message that said they were looking to detach Mozilla from the project completely, partially because it didn&#x27;t have enough industry-wide impact to be worth Mozilla&#x27;s resources [2].<p>The sad fact is that desktop mail clients are going away, and even the big projects like Thunderbird are barely limping along, which I guess is slightly nicer terminology than &quot;pretty much dead&quot;?<p>[0] <a href="https:&#x2F;&#x2F;www.mozilla.org&#x2F;en-US&#x2F;thunderbird&#x2F;releases&#x2F;" rel="nofollow">https:&#x2F;&#x2F;www.mozilla.org&#x2F;en-US&#x2F;thunderbird&#x2F;releases&#x2F;</a><p>[1] <a href="https:&#x2F;&#x2F;blog.lizardwrangler.com&#x2F;2012&#x2F;07&#x2F;06&#x2F;thunderbird-stability-and-community-innovation&#x2F;" rel="nofollow">https:&#x2F;&#x2F;blog.lizardwrangler.com&#x2F;2012&#x2F;07&#x2F;06&#x2F;thunderbird-stabi...</a><p>[2] <a href="http:&#x2F;&#x2F;techcrunch.com&#x2F;2015&#x2F;11&#x2F;30&#x2F;thunderbird-flies-away-from-mozilla&#x2F;" rel="nofollow">http:&#x2F;&#x2F;techcrunch.com&#x2F;2015&#x2F;11&#x2F;30&#x2F;thunderbird-flies-away-from...</a>