software installation - Get latest Thunderbird version (38.0.1 for 15.04 32bit)

Ubuntu 15.04 comes with Thunderbird version 31.7.0, but the current latest stable version is 38.0.1 (date: 1st July 2015).

$ apt-cache policy thunderbird
thunderbird:

  Installed: 1:31.7.0+build1-0ubuntu0.15.04.1
  Candidate: 1:31.7.0+build1-0ubuntu0.15.04.1
[...]

1. Does it make sense to update?


2. Why does Ubuntu not provide the latest version in its repository?


3. How can I get it without too much pain?

1. It makes sense!


2. Maybe the new design???



3. Using a PPA:

   
   
   

   sudo add-apt-repository ppa:mozillateam/thunderbird-next
   sudo apt-get update
   sudo apt-get dist-upgrade