I just saw that you published the brand new Programmer's Guide for the "PS 2000 A API":
It says that streaming mode now allows up to 30 MS/s. Great ! Is this also possible with the Linux driver ? If so, this would be a strong argument to replace my old PS2205 with a new device that supports the "A API". The only remaining subtlety would be that the Linux driver for the "A API" supports only 32 bit Linux, while I have a 64 bit Linux. This problem could be solved with a Virtual Machine, but it would be more convenient to have 64 bit support in the Linux driver.