I wish we never had the major server issue over a year ago that forced us to make some difficult choices about removing features. Many things have changed for us over the past decade (plus) and the ways we made money to support the site have all but evaporated, so certain costly features had to be sacrificed. Throw in the fact we are in the middle of a pandemic and that there were two major family health issues that sucked Jeff's spare time this past year, many plans and fixes were not implemented.
Is this an excuse? No, just the truth. Jeff is working on a slimmed down and more current version of Brickpicker, but the Brickfolio might not be in the final version. On a personal note, most member's LEGO inventories are probably so different at this point, what use will the data be? Most major resellers I know had their own spreadsheets to track their data. What I would suggest is that if the data is so important to you, message Jeff and ask him for it. I make no promises, but I think you will catch more flies with honey than vinegar.
Stay safe...Ed Mack