IMAGINE person1 has 20GB of emails saved in an Outlook Data File (ODF1). The emails (sent and received) span 30 years. They originated from 20 different, separate email accounts (including several DIFFERENT email accounts in each of yahoo.com, hotmail.com, gmail.com, mail.com, outlook.com, etc.). Each email from each different email account was synced from each email account’s online webserver with the Outlook email client of Microsoft Office's Outlook desktop app. Each email from each different email account was then MOVED from the Microsoft Office's Outlook INBOX of each different email account into FOLDERS (each organized by category and/or subject matter) corresponding to the category and/or subject matter of each email from all the different email accounts. Person1's current modus operandi has been to save ODF1 on 2-3 external hard drives in order to (i) safeguard the integrity and posterity of all 20GB of emails and (ii) facilitate transitioning from a previous OLD computer to a future NEW computer. Unfortunately, Microsoft has made the latter process onerous and expensive by transitioning from (a) the Home Use Program (HUP), which supplied “permanent” software (e.g., perpetual license for Microsoft Office Professional Plus 2016), which was sold to member-employees for $10 and had updates for at least 10 years (effective user cost ca. $1 per year over 10 years), to (b) the Workplace Discount Program (WDP) which merely provides a 30% discount off the $100/year Microsoft 365 Personal subscription each year (effective user cost ca. $70 per year) ==> WDP effectively costs 70x what HUP used to cost each user. Consequently, person1 wants to abandon Microsoft products altogether (especially since person1 uses only Word and Outlook) and find an alternative way to use ODF1 substantially and substantively the same way as person1 currently uses Microsoft Office's Outlook FOLDERS to save all the emails from all the various email accounts. For example, Google Docs is more than adequate to replace Microsoft Word for Person1’s use. But person1 has not yet found an alternative for how person1 currently uses Microsoft Office's Outlook FOLDERS to save all the emails from all the various email accounts. QUESTION: Will Thunderbird enable person1 to continue to use ODF1 substantially and substantively the same way as person1 currently uses Microsoft Office's Outlook FOLDERS to save (and transfer) all the emails from all the various email accounts, BUT WITHOUT using any version of Microsoft Office nor Microsoft 365 Personal? If NOT, why not?