[zd1200] Is the classic old legacy interface GUI dashboard gone for good? (admin10 > admin)

[jjbase]

Hello, I own a ZD1200. 
Since the new shiny GUI was introduced for the dashboard, I kept using the legacy GUI because I liked it, I found it easier to navigate and I preferred its old-timey look. 
I would login into the new interface, and then go to the old interface (one just needed to change “admin10” with “admin” in the address bar). 
I was on a 10.x firmware from last year. 
Recently I upgraded to 10.3.1.0 build 24 and I noticed I can’t access the legacy dashboard anymore. 

Is it gone for good this time? 
Am I doing something wrong? Was the upgrade botched? 
Is there a new way to access it or enable it via command line?

Here’s what I get at 
h t t p s://(IP of the ZD1200)/admin/app.jsp#/Dashboard

[syamantakomer]

Hi Jjbase,

Old GUI has been removed on newer versions and will not be available anymore.

Regards,
Syamantak Omer

[michael_brado]

New feature/functions aren't available in old browser views...

[jjbase]

Thanks to both.
I guess I’ll finally cave in and learn my way around the new GUI..