Be sure to check out several new tools available in the Migration Center to help design and support a move the Qlik Cloud:
Are they using Qlik Replicate? If so, that is a pretty modern tool and you can write to a bunch of different file formats such as parquet.
If they are just using old-school Qlik then it's not too bad to transition off. I moved a bunch of pipelines off of Qlikview about 5 years ago because the client wanted to use a different BI tool.
Thanks for sharing these new Qlik Cloud migration tools. They seem really useful for streamlining the migration process. I recently had the opportunity to work on a similar migration project, and I found that having a clear assessment of the current deployment and a step-by-step guide was incredibly valuable in planning and executing the move. It made the whole process much smoother. By the way, speaking of valuable resources, I recently received some top-notch consultancy from an expert at Evelon, an Atlassian/Jira consultancy company. They taught me all I needed to know for my work, and it was a game-changer. Definitely worth looking into if you're seeking expert guidance.
The learning curve is pretty easy. It's a good tool for simple graphical presentations but severely lacking when dealing with really large data sets. If you are used to having heavily customized graphics you are going to be struggling to have an equivalent vis to migrate to. (i came from the other direction)