The long-term support (LTS) releases of Ubuntu used to get support for five years. This is changing now. Ubuntu 18.04 will now be supported for ten years. Other LTS releases might also get an extended support.
Ubuntu’s founder Mark Shuttleworth announced this news in a keynote at OpenStack Summit in Berlin.
I’m delighted to announce that Ubuntu 18.04 will be supported for a full 10 years.

A Move to lead the Internet of Things (IoT)
We are living in a ‘connected world’. The smart devices are connected to the internet everywhere and these are not limited to just smartphones. Toys, cameras, TVs, Refrigerators, Microwaves, weighing scales, electric bulbs and what not.
Collectively, they are called
The 10-years support announcement for Ubuntu 18.04 is driven by the needs of the IoT market.
…in some of
industries like financial services and telecommunications but also from IoT where manufacturing linesfor example are being deployed that will be in production for at least a decade.
Ubuntu 16.04, scheduled to reach its end of life in April 2021, will also be given a longer support
What is not clear to me at this moment is whether the extended support is free of cost and if it is, will it be available to all the users including the desktop ones.
Ubuntu has an Extended Security Maintenance (ESM) option for its corporate customers. With ESM, the customers get security fixes for the kernel and essential packages for a few more years even after the end of life of a certain LTS release.
Of course, ESM is a paid feature and it is one of the many ways Canonical, the company behind Ubuntu, generates revenue.
At the moment, it is not clear if the ten years support is for everyone or if it will be a paid service under Extended Security Maintenance. I have contacted Ubuntu for a clarification and I’ll update this article if I get an answer.
Ubuntu is not for sale…yet
After IBM bought Red Hat for $34 billion, people have started wondering if Ubuntu will be sold to a big player like Microsoft.
Shuttleworth has clarified that he has no plans of selling Ubuntu anytime soon. However, he ambiguously also said that he might consider it if its a gigantic offer and if he will be left in charge of Canonical and Ubuntu to realize his vision.
Source: ZDNet

Holy shit… If ubuntu gets sold to any big corporates that basically don’t support open source or trying to sabotage linux from within, I’ll definitely move to debian
Thanks Abhishek for the nice & V.good news. I like & use Ubuntu mate 18.4 . I give lectures for the new users of Ubuntu 16.4 &18.4 too, LibreOffice 6.
Good job for helping new users.
Calling it Ubuntu 16.4 is not a good idea because it will cause confusion when there is actually a Ubuntu 16.10. People might think that Ubuntu 16.4 would be “newer” than 16.10. You should call it Ubuntu 16.04 because that shows that it is indeed older than Ubuntu 16.10
Sure, by that time the devs would learn how to stop D2D and Ubuntu dock stop appearing at the same time. Or find a new dock. They should’ve stayed with Unity, for no “extension” was needed — home grown DE.
You do have a point but the move is more focused on server users and they haven’t clarified that it is only for servers or for desktop users as well.
Just the possibility that Ubuntu 18.04 will have 10-year support is amazing. I have Ubuntu 18.04 installed on a mid, 2007 Mac. We’re talking about 21 years of life for this computer if that’s the case.
I’m in a similar boat with an old iMac. Considering 18.04 is the last 32 bit desktop version, extended support for that would be awesome!