Are applications developed in Apex 3.1 compatible on Apex 4.1.0?

Hi guys,
I've only started working on Oracle Apex since version 4.1 and currently working on an application in DEV (apex 3.1) to be moved to prod (in APEX 4.1).
I got no idea regarding compatibility, whether the whole application wont work or certain documented features doesn't work.
Could any APEX gurus who developed application 3.1 and deployed in 4.1, could you please share your experience if there is anything I should be watching out for?

Hello,
Marc advised you:
>> and I would advice against developing on 3.x and deploying to 4.x.
Just in case you don’t know, Marc is a member of the development team and responsible, among other things, to the Tabular Forms development. This feature was considerably enhanced between 3.x and 4.x. Although, as Marc pointed out, things you develop on 3.x should work well on 4.x, but by developing on 3.x you are missing a lot of great new features that can make your life much easier, and Tabular Form is just one example. You should read the What’s New section of the 4.x documentation to get a clue on what you might be missing by continue developing on 3.x.
Regards,
Arie.
&diams; Please remember to mark appropriate posts as correct/helpful. For the long run, it will benefit us all.
&diams; Author of Oracle Application Express 3.2 – The Essentials and More

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