Verdict: Yes
Yes. Thunderbird has an official Linux version on the same download page as the Windows one, and it is also on Flathub and the Snap Store.
Thunderbird lists Windows, Mac and Linux side by side on its download page, with Flathub and Snap Store versions as well. Many Linux systems put it in their app store, so installing it is a couple of clicks.
Moving across is easier than with most apps because Thunderbird keeps everything, including your accounts, messages, address book and settings, inside one profile folder. Copy that folder from the Windows machine into the matching place on Linux and you get your old mail, exactly as it was.
If you would rather start clean, just add your accounts again. Mail that lives on a server, which is how Gmail, Outlook.com and most providers work, downloads again on its own. Mail you had only on the Windows PC does not, so copy the profile folder if any of it matters.
The same app from the same people. Your profile folder can be copied straight across from Windows.
Your files: Copying the Thunderbird profile folder brings accounts, stored mail, address book and settings with it.
Worth knowing about if you need to connect to a work Exchange mailbox, which Thunderbird does not do on its own.
Your files: Imports mail folders and contacts, though it is a manual step rather than a copied folder.
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