This is one of the best updates launched by ERPNext.
ERPNext has used one of its kind technique to solve the problem of existing users.
There were 2 major issues:
Reports are expensive: They take a lot of processing and since we host many customers on one server, we were vary of have too any queries clogging our servers.
Browser has its limitations: Until recently, it was not possible to show a lot of data on the browser. The performance would degrade rapidly after a few hundred rows of data.
ERPNext did is probably unique in the world of ERP systems. Instead of letting the server do all the heavy processing, we decided that we will dump all the required data in the client (based on permissions of course!) and let the browser compute all the analysis.
This really worked, check it out on our website. www.erpnext.com