What are the disadvantages of traditional oa system?

The traditional OA system was basically developed and formed before 10, and the development languages were php and jsp which were popular before 10 (as can be seen from the system website). A new generation of OA-led 10oa collaborative operation platform, with BPM as the core, has always adopted the most advanced network technology, keeping up with the pace of society, not only in terms of high security performance, simple interface design and easy operation, but also on the premise of the best user experience, improving work efficiency.