I have been using Thunderbird for years. Every now and again I get curious about what else is out there and I start looking into alternatives like Claws or Neomutt. But then inevitably I realise that these are simply solutions in search of a problem for me, that Thunderbird continues to work absolutely fine and there is really no reason to switch. I understand others will have a different use case to me but it always blows my mind to see people having so many problems with Thunderbird when it has been just a very consistent workhorse in my experience.

I use Thunderbird for personal stuff and Outlook for work. I know it's probably not a fair comparison as my work laptop is slowed down by all the security stuff and general corporate spyware, but damn I only wish my work email could be half as snappy as my personal email.

A tip for those complaining about search, particularly about its performance: if you can, try filtering instead. It's more limited (I think it only searches sender and subject line) but it is blazingly fast for me, filtering out several GB of emails in less than a second, always.

Finally, for those wondering why an email client needs to be built on top of a web browser - this is because in 2023, most "normies" receive a lot of email that is heavy on HTML, so in order to be in any way useful to the majority of users, an email client needs to be really good at parsing HTML, which browsers are. Of course it seems like overkill if you only receive plaintext email.