offline access

The author switched from Gmail to Thunderbird after 15 years, citing frustrations with Gmail's ad inundation and cluttered features. They appreciate Thunderbird's offline email access, extensive customization options, open-source nature, absence of forced AI features, free distribution without targeted ads, cross-platform compatibility, reliable notifications, effective multi-account management, customizable junk filtering, and its focus solely on email functionality. These aspects have led to a more streamlined and efficient email experience compared to Gmail.