FWIW, I've evaluated email clients from time to time, but haven't found anything I like enough to replace Gmail. I haven't tried Thunderbird for years because I don't want to use a client without conversation view, and Thunderbird doesn't seem to offer it as a core feature; I could try one of the extensions for it, but I'm suspicious it won't work well. Also, I'm not sure I want to start using a product that's been on life support for two years. However, I admit these are relatively small turnoffs, so perhaps I should give Thunderbird a spin some time...

Anyway, it's off topic.