Is Themler still relevant in 2020?
Without any twist, I can clearly say that there is no relevance in using Themler nowadays.
Themler is no longer producing new themes or templates, they are not ready to provide any update of their old products. Furthermore, they are busy with their new product Nicepage; as a result, they don't provide support on a regular basis.
What Is Themler?
Themler provides a visual drag-and-drop interface that makes it easy for anyone to produce professional designs for a variety of CMSes. Basically, it is built to create responsive web designs for existing content management systems like WordPress, Joomla, Ebay's Magento, Drupal, and PrestaShop.
Legacy of Themler
I think many of you don't know that Themler is a successor of Artisteer. And at the same time, Themler is the predecessor of the Nicepage. That means Artisteer, Themler, and Nicepage all share the same root.
Main Reasons to Avoid Themler
Themler has stopped producing new templates or themes for any CMSes users. So, if you are a Joomla or WordPress lover and want to create a website using these CMSes, you should not choose Themler. Because Themler won't provide you up to date themes or templates.
Alternative Choice of Themler
Now, you may think about what will be your alternative if you stop using Themler.