I took a quick look and still prefer Thunderbird. Over the years tb has matured enough that it's solid and reliable. All I want from my work email client. For personal stuff, I'd never consider a client, other than the browser.
Even Evolution, which had a history of crashing if I looked at it funny, and seemed to be implemented as a loosely associated group of processes, any one of which could decide to monopolize the CPU and/or disk IO at any point never lost e-mail messages for me.