We're just updating all of our templates and design documentation as we switch to a new ESP and we're looking at the 'plain text version' wondering if anyone still uses this? In our current workflow we still tidy up the auto-generated version stripping out ALT text and formating headers with underlines, etc. but we're not sure if this is still worth it.

In this day and age when we have templates that are responsive and gracefully downgrade features in Outlook, is the plain text version still needed or is it just a throwback to when everyone had a blackberry?

All advice and experience where it is still used is very much welcomed. I'd also love to hear from anyone who has long abandoned bothering with the plain text version and had no detrimental impact on deliverability etc.

PS - apologies if this has been covered elsewhere - I did do a search but the only topics relating to plain text were very old, which kind of cemented my question.