What is the text email template drawback in Salesforce?

Hi,

Disadvantages - 

• You can't count the number that is how many time it opened.
• You can't use colors to give a visual impact.
• Scanning is harder in this template

To add more -

If you run into formatting issues with HTML Email Templates, you may want to use text emails. You can still use HTML Solutions with this and the email will look the same across all email services.  Frequently HTML emails are interpreted differently by different email services, thus resulting in ugly formatting.  When using Salesforce.com Letterhead email templates, you do not have the ability to use HTML code in the text body, thus resulting in awkward formatting in some email services.  You can fix this problem by either using custom email templates which allow HTML coding throughout the email, but do not allow for on the fly changes when users access the template, or you can use text emails.  Text emails still work with HTML templates when being sent from a Case as long as you use this merge field for the solution description: {!Case.Solution_Description}.

Text version of Templates are used for Email clients that only accept text emails.

Hope this helps.