Textual words from them:
It’s our first step towards a more modern, more beautiful, and more customizable Thunderbird experience. We think you’re going to love it, and we are endlessly grateful for all of your support throughout the years 💙
I don’t like the new logo; it looks mean. The previous logo showed a charming bird that delivered my mail, the new one portrays a bird of prey clutching a letter, it will probably bite you if you try to retrieve the letter.
Is this better?