[righthand]

Same. I opened Thunderbird recently after probably over a year and this switch to a browser rendering engine. The entire application locked up while it was updating my list of emails. I’m glad the project is seeing some FOSS love but it also seems to have gone down the entirely wrong path in pursuit of modernization without benefit.

Sadly for Linux there aren’t really any great modern UI-style (not browser rendering modern but just the look) email clients so I’ll just keep using my browser since there is now no benefit to using Thunderbird.

Oh and this is a brand new machine I built in 2022. So it’s not the hardware.

[jhoechtl]

My answer us certainly subjective but I find Gnome Evolution quite fast, user driendly and well designed.

[jordigh]

Another vote for Evolution here. I also like its calendar integration. Works well on its own or can interface with Google Calendar as you prefer.