If I understand it correctly it normally only has 64kB of RAM for all the cores together. And 512kB Flash memory. It seems to be possible to add max. 16MB of ex

If I understand it correctly it normally only has 64kB of RAM for all the cores together. And 512kB Flash memory. It seems to be possible to add max. 16MB of external RAM of some proprietary kind (HyperBus interface). For applications that usually need a lot of processing power that's not a lot. 333Mbps memory bandwidth isn't either. Regarding libraries I would expect that they mean that lots of open source libraries and RTOS might probably run.