May I use all existing OO classes CL_DEMO_OUTPUT

He guys,

I’m pretty much confused right now (probably cause I’m new to OO)

So far, I thought I can use all CL* Classes in my programs, can’t I?

If not, how can I distinguish among them for example cl_salv_table is OK but others are not?

What is this restriction “not for productive use” on CL_DEMO_OUTPUT about?

https://blogs.sap.com/2016/05/10/cldemooutput-part-2-of-2-a-look-behind/

Can I at least copy this class, because it is very handy and use it in production?

Best regards

Marion