Why would you subject yourself to that torture? Thunderbird is like LibreOffice is to MS Office, meaning you will have to adapt, but it is still lean for being a contemporary email client.
MS can take my VBA macros from my cold, dead, fingers: the JS-based replacement in New Outlook is incredibly neutered, such as local filesystem access or managing message attachments.
Why would you subject yourself to that torture? Thunderbird is like LibreOffice is to MS Office, meaning you will have to adapt, but it is still lean for being a contemporary email client.